diff --git a/main_v2.py b/main_v2.py
index e9f6cdc..7767e9f 100644
--- a/main_v2.py
+++ b/main_v2.py
@@ -1,6 +1,6 @@
 """
-AI对话系统 v2.0.0 - 主应用
-支持：大模型池、Agent管理、渠道独立绑定、思考功能开关
+AI对话系统 v3.0.0 - 主应用
+支持：大模型池、Agent管理、渠道独立绑定、思考功能开关、Function Calling（LLM自主调用工具）
 """
 from fastapi import FastAPI, WebSocket, WebSocketDisconnect, Depends, HTTPException, Request
 from fastapi.responses import HTMLResponse, JSONResponse
@@ -122,6 +122,7 @@ async def get_providers(db: Session = Depends(get_db)):
                 "thinking_model": p.thinking_model,
                 "supports_vision": p.supports_vision,
                 "vision_model": p.vision_model,
+                "supports_function_calling": p.supports_function_calling,
                 "max_tokens": p.max_tokens,
                 "temperature": p.temperature,
                 "is_active": p.is_active,
@@ -832,7 +833,7 @@ async def websocket_endpoint(websocket: WebSocket, user_id: str):
                     conversation_id = data.get("conversation_id")
                     enable_thinking = data.get("enable_thinking", True)
                     agent_id_override = data.get("agent_id")
-                    disabled_tools = data.get("disabled_tools", [])  # 禁用的工具列表
+                    # v3.0: 移除 disabled_tools，由LLM自主决定
                     
                     if agent_id_override:
                         agent = agent_service.get_agent(agent_id_override)
@@ -846,48 +847,41 @@ async def websocket_endpoint(websocket: WebSocket, user_id: str):
                     if not message.strip() and not files:
                         continue
                     
-                    # 处理文件内容，添加到消息
-                    image_contents = []  # 图片内容（用于视觉模型）
-                    text_contents = []  # 文本文件内容
-                    image_paths = []  # 图片服务器路径（用于历史记录显示）
+                    # 处理文件内容
+                    image_contents = []
+                    text_contents = []
+                    image_paths = []
                     if files:
                         for f in files:
                             if f.get('type') and f['type'].startswith('image/'):
-                                # 图片：记录 base64 数据，用于视觉模型
                                 image_contents.append({
                                     'name': f['name'],
                                     'type': f['type'],
-                                    'data': f.get('content', '')  # base64 数据
+                                    'data': f.get('content', '')
                                 })
-                                # 记录服务器路径（用于历史记录）
                                 if f.get('serverPath'):
                                     image_paths.append({
                                         'name': f['name'],
                                         'type': f['type'],
-                                        'url': f['serverPath']  # 服务器文件路径
+                                        'url': f['serverPath']
                                     })
-                                # 不添加文件名文本，图片信息保存在 extra_data 中
                             elif f.get('content'):
-                                # 文本文件：直接添加内容，不带文件名前缀
                                 text_contents.append(f['content'][:3000])
                                 if len(f['content']) > 3000:
                                     text_contents[-1] += "...(内容过长已截断)"
                     
-                    # 如果有文本文件内容，追加到消息后面
                     if text_contents:
                         for content in text_contents:
                             message += f"\n\n{content}"
                     
-                    # 保存图片和文件信息到 extra_data（用于历史记录）
+                    # 保存文件信息到 extra_data
                     extra_data_for_msg = None
                     if image_paths:
-                        # 图片保存服务器路径URL，历史记录可以显示
                         extra_data_for_msg = {
                             'images': image_paths,
                             'files': [{'name': f['name'], 'type': f['type']} for f in files if not f['type'].startswith('image/')]
                         }
                     elif image_contents:
-                        # 没有服务器路径但有问题（可能上传失败）
                         extra_data_for_msg = {
                             'images': [{'name': i['name'], 'type': i['type']} for i in image_contents],
                             'files': [{'name': f['name'], 'type': f['type']} for f in files if not f['type'].startswith('image/')]
@@ -896,8 +890,9 @@ async def websocket_endpoint(websocket: WebSocket, user_id: str):
                     # 1. 获取Agent配置
                     agent_config = agent_service.get_agent_config(current_agent_id)
                     agent_tools = agent_config.get('agent', {}).get('tools', [])
+                    supports_function_calling = agent_config.get('provider', {}).get('supports_function_calling', False)
                     
-                    # 2. 获取或创建会话（先有 conversation_id）
+                    # 2. 获取或创建会话
                     if conversation_id:
                         conversation = conv_service.get_conversation(conversation_id)
                     else:
@@ -908,12 +903,12 @@ async def websocket_endpoint(websocket: WebSocket, user_id: str):
                             "conversation_id": conversation_id
                         })
                     
-                    # 3. 广播用户消息（前端立即看到）
+                    # 3. 广播用户消息
                     await manager.send_to_user(MAIN_USER_ID, {
                         "type": "user_message",
                         "conversation_id": conversation_id,
                         "message": {
-                            "id": None,  # 临时，后面会保存
+                            "id": None,
                             "role": "user",
                             "content": message,
                             "source": "web",
@@ -921,118 +916,45 @@ async def websocket_endpoint(websocket: WebSocket, user_id: str):
                         }
                     })
                     
-                    # 4. 执行搜索并发送搜索结果
-                    search_context = None
-                    search_results_for_client = None  # 用于发送给前端和保存
-                    logger.info(f"检查搜索条件: agent_tools={agent_tools}, disabled_tools={disabled_tools}")
-                    
-                    if 'search' in agent_tools and 'search' not in disabled_tools:
-                        logger.info("搜索条件满足，开始执行搜索")
-                        
-                        tool_service = ToolService(db)
-                        search_tool = tool_service.get_default_tool('search')
-                        logger.info(f"获取到搜索工具: {search_tool.name if search_tool else 'None'}")
-                        
-                        if search_tool and search_tool.config.get('api_key'):
-                            import httpx
-                            import time
-                            start_time = time.time()
-                            try:
-                                logger.info(f"执行搜索: query={message}")
-                                tavily_url = "https://api.tavily.com/search"
-                                config = search_tool.config
-                                payload = {
-                                    "api_key": config.get('api_key'),
-                                    "query": message,
-                                    "max_results": config.get('max_results', 5),
-                                    "search_depth": config.get('search_depth', 'basic')
-                                }
-                                
-                                with httpx.Client(timeout=30) as client:
-                                    resp = client.post(tavily_url, json=payload)
-                                    search_result = resp.json()
-                                
-                                duration_ms = int((time.time() - start_time) * 1000)
-                                
-                                if search_result.get("results"):
-                                    # 构建搜索上下文（给LLM）
-                                    max_for_llm = config.get('max_results', 5)
-                                    search_context = "\n\n【搜索结果】\n"
-                                    for i, r in enumerate(search_result["results"][:max_for_llm], 1):
-                                        search_context += f"{i}. {r.get('title', 'N/A')}\n   {r.get('content', r.get('snippet', 'N/A'))[:200]}\n   来源: {r.get('url', 'N/A')}\n"
-                                    logger.info(f"搜索完成: {len(search_result['results'])} 条结果，使用 {min(len(search_result['results']), max_for_llm)} 条")
-                                    
-                                    # 发送搜索结果给前端（按配置的数量）
-                                    max_display = config.get('max_results', 5)
-                                    search_results_for_client = [
-                                        {
-                                            "title": r.get('title', 'N/A'),
-                                            "snippet": r.get('content', r.get('snippet', ''))[:150],
-                                            "url": r.get('url', 'N/A')
-                                        }
-                                        for r in search_result["results"][:max_display]
-                                    ]
-                                    await websocket.send_json({
-                                        "type": "search_results",
-                                        "conversation_id": conversation_id,
-                                        "results": search_results_for_client,
-                                        "query": message
-                                    })
-                                    
-                                    # 更新统计和日志
-                                    tool_service.increment_stats(search_tool.id, True)
-                                    tool_service.log_usage({
-                                        'tool_id': search_tool.id,
-                                        'tool_type': 'search',
-                                        'query': message,
-                                        'success': True,
-                                        'result_summary': f'{len(search_result["results"])} results',
-                                        'conversation_id': conversation_id,
-                                        'agent_id': current_agent_id,
-                                        'duration_ms': duration_ms
-                                    })
-                            except Exception as e:
-                                duration_ms = int((time.time() - start_time) * 1000)
-                                logger.error(f"搜索失败: {e}")
-                                tool_service.increment_stats(search_tool.id, False)
-                                tool_service.log_usage({
-                                    'tool_id': search_tool.id,
-                                    'tool_type': 'search',
-                                    'query': message,
-                                    'success': False,
-                                    'error_message': str(e),
-                                    'conversation_id': conversation_id,
-                                    'duration_ms': duration_ms
-                                })
-                    
-                    # 5. 保存用户消息到数据库
-                    extra_data_to_save = None
-                    if search_results_for_client:
-                        extra_data_to_save = {'search_results': search_results_for_client, 'search_query': message}
-                    if extra_data_for_msg:
-                        if extra_data_to_save:
-                            extra_data_to_save.update(extra_data_for_msg)
-                        else:
-                            extra_data_to_save = extra_data_for_msg
-                    
+                    # 4. 保存用户消息
                     user_msg = conv_service.add_message(
                         conversation_id=conversation.id,
                         role='user',
                         content=message,
                         source='web',
-                        extra_data=extra_data_to_save
+                        extra_data=extra_data_for_msg
                     )
                     
-                    # 6. 获取对话历史（包含刚保存的用户消息）
+                    # 5. 获取对话历史
                     history = conv_service.get_conversation_history(conversation_id, limit=agent_config['agent'].get('max_history', 20))
                     
-                    # 7. 如果有搜索结果，添加到消息中
-                    if search_context:
-                        modified_system_prompt = agent_config['agent'].get('system_prompt', '') + "\n\n如果提供了搜索结果，请基于搜索结果回答用户问题，并注明信息来源。"
-                        agent_config['agent']['system_prompt'] = modified_system_prompt
-                        history.append({"role": "system", "content": f"以下是搜索到的相关信息，请参考这些内容回答用户问题：{search_context}"})
+                    # 6. 构建工具 schema（Function Calling）
+                    tools_schema = []
+                    if supports_function_calling and agent_tools:
+                        # 搜索工具
+                        if 'search' in agent_tools:
+                            tool_service = ToolService(db)
+                            search_tool = tool_service.get_default_tool('search')
+                            if search_tool and search_tool.config.get('api_key'):
+                                tools_schema.append({
+                                    "type": "function",
+                                    "function": {
+                                        "name": "web_search",
+                                        "description": "搜索互联网获取实时信息、新闻、数据等。当用户询问需要最新信息的问题时使用此工具。",
+                                        "parameters": {
+                                            "type": "object",
+                                            "properties": {
+                                                "query": {
+                                                    "type": "string",
+                                                    "description": "搜索关键词或问题"
+                                                }
+                                            },
+                                            "required": ["query"]
+                                        }
+                                    }
+                                })
                     
-                    # 8. 调用LLM返回回复
+                    # 7. 调用LLM（Function Calling模式）
                     if not agent_config or not agent_config.get('provider'):
                         await websocket.send_json({
                             "type": "error",
@@ -1041,17 +963,185 @@ async def websocket_endpoint(websocket: WebSocket, user_id: str):
                         continue
                     
                     try:
-                        response, thinking_content = await llm_service.chat(
-                            messages=history,
-                            provider_config=agent_config['provider'],
-                            agent_config=agent_config['agent'],
-                            enable_thinking=enable_thinking,
-                            images=image_contents  # 传递图片数据给多模态模型
-                        )
+                        response = None
+                        thinking_content = None
+                        tool_calls_record = []
+                        
+                        # 第一阶段：让LLM决定是否调用工具
+                        if tools_schema:
+                            response, thinking_content, tool_calls = await llm_service.chat_with_tools(
+                                messages=history,
+                                provider_config=agent_config['provider'],
+                                agent_config=agent_config['agent'],
+                                tools=tools_schema,
+                                enable_thinking=enable_thinking,
+                                images=image_contents
+                            )
+                            
+                            # 如果LLM请求调用工具
+                            if tool_calls:
+                                logger.info(f"LLM请求调用工具: {tool_calls}")
+                                
+                                # 发送工具调用通知给前端
+                                await websocket.send_json({
+                                    "type": "tool_calls",
+                                    "conversation_id": conversation_id,
+                                    "tool_calls": [
+                                        {"name": tc['name'], "arguments": tc['arguments']}
+                                        for tc in tool_calls
+                                    ]
+                                })
+                                
+                                # 执行工具调用
+                                tool_results = []
+                                tool_service = ToolService(db)
+                                search_tool = tool_service.get_default_tool('search')
+                                
+                                for tc in tool_calls:
+                                    if tc['name'] == 'web_search':
+                                        query = tc['arguments'].get('query', message)
+                                        logger.info(f"执行搜索: query={query}")
+                                        
+                                        import httpx
+                                        import time
+                                        start_time = time.time()
+                                        
+                                        try:
+                                            tavily_url = "https://api.tavily.com/search"
+                                            config = search_tool.config
+                                            payload = {
+                                                "api_key": config.get('api_key'),
+                                                "query": query,
+                                                "max_results": config.get('max_results', 5),
+                                                "search_depth": config.get('search_depth', 'basic')
+                                            }
+                                            
+                                            with httpx.Client(timeout=30) as client:
+                                                resp = client.post(tavily_url, json=payload)
+                                                search_result = resp.json()
+                                            
+                                            duration_ms = int((time.time() - start_time) * 1000)
+                                            
+                                            if search_result.get("results"):
+                                                # 构建搜索结果
+                                                search_content = []
+                                                for i, r in enumerate(search_result["results"][:5], 1):
+                                                    search_content.append({
+                                                        "title": r.get('title', 'N/A'),
+                                                        "content": r.get('content', r.get('snippet', ''))[:300],
+                                                        "url": r.get('url', 'N/A')
+                                                    })
+                                                
+                                                tool_results.append({
+                                                    "tool_call_id": tc['id'],
+                                                    "content": json.dumps(search_content)
+                                                })
+                                                
+                                                # 发送搜索结果给前端
+                                                await websocket.send_json({
+                                                    "type": "search_results",
+                                                    "conversation_id": conversation_id,
+                                                    "results": [
+                                                        {"title": r.get('title'), "snippet": r.get('content', '')[:150], "url": r.get('url')}
+                                                        for r in search_result["results"][:5]
+                                                    ],
+                                                    "query": query
+                                                })
+                                                
+                                                # 记录日志
+                                                tool_service.increment_stats(search_tool.id, True)
+                                                tool_service.log_usage({
+                                                    'tool_id': search_tool.id,
+                                                    'tool_type': 'search',
+                                                    'query': query,
+                                                    'success': True,
+                                                    'result_summary': f'{len(search_result["results"])} results',
+                                                    'conversation_id': conversation_id,
+                                                    'agent_id': current_agent_id,
+                                                    'duration_ms': duration_ms
+                                                })
+                                                
+                                                tool_calls_record.append({
+                                                    "name": "web_search",
+                                                    "query": query,
+                                                    "results_count": len(search_result["results"])
+                                                })
+                                                
+                                        except Exception as e:
+                                            logger.error(f"搜索失败: {e}")
+                                            duration_ms = int((time.time() - start_time) * 1000)
+                                            tool_service.increment_stats(search_tool.id, False)
+                                            tool_service.log_usage({
+                                                'tool_id': search_tool.id,
+                                                'tool_type': 'search',
+                                                'query': query,
+                                                'success': False,
+                                                'error_message': str(e),
+                                                'conversation_id': conversation_id,
+                                                'duration_ms': duration_ms
+                                            })
+                                            tool_results.append({
+                                                "tool_call_id": tc['id'],
+                                                "content": json.dumps({"error": str(e)})
+                                            })
+                                
+                                # 将工具调用消息添加到历史
+                                # 注意：这里需要将 assistant 的 tool_calls 消息添加到历史
+                                # 但我们用的是简化的历史格式，需要重新构建
+                                
+                                # 第二阶段：将工具结果返回给LLM
+                                if tool_results:
+                                    # 重新获取完整历史（包含工具调用）
+                                    history_with_tools = history.copy()
+                                    # 添加 assistant 的 tool_calls 消息
+                                    history_with_tools.append({
+                                        "role": "assistant",
+                                        "content": None,
+                                        "tool_calls": [
+                                            {
+                                                "id": tc['id'],
+                                                "type": "function",
+                                                "function": {
+                                                    "name": tc['name'],
+                                                    "arguments": json.dumps(tc['arguments'])
+                                                }
+                                            }
+                                            for tc in tool_calls
+                                        ]
+                                    })
+                                    # 添加工具结果
+                                    for tr in tool_results:
+                                        history_with_tools.append({
+                                            "role": "tool",
+                                            "tool_call_id": tr['tool_call_id'],
+                                            "content": tr['content']
+                                        })
+                                    
+                                    response, thinking_content = await llm_service.chat_with_tool_results(
+                                        messages=history_with_tools,
+                                        provider_config=agent_config['provider'],
+                                        agent_config=agent_config['agent'],
+                                        tool_results=tool_results,
+                                        enable_thinking=enable_thinking
+                                    )
+                        
+                        # 如果不支持 Function Calling 或没有工具，直接调用普通 chat
+                        if response is None:
+                            response, thinking_content = await llm_service.chat(
+                                messages=history,
+                                provider_config=agent_config['provider'],
+                                agent_config=agent_config['agent'],
+                                enable_thinking=enable_thinking,
+                                images=image_contents
+                            )
                         
                         logger.info(f"LLM响应: response长度={len(response)}, thinking长度={len(thinking_content) if thinking_content else 0}")
                         
                         # 保存AI回复
+                        extra_data_to_save = None
+                        if tool_calls_record:
+                            extra_data_to_save = {'tool_calls': tool_calls_record}
+                        
                         assistant_msg = conv_service.add_message(
                             conversation_id=conversation.id,
                             role='assistant',
@@ -1059,7 +1149,8 @@ async def websocket_endpoint(websocket: WebSocket, user_id: str):
                             source='web',
                             thinking_content=thinking_content if thinking_content else None,
                             agent_id=current_agent_id,
-                            model_used=agent_config['provider'].get('default_model')
+                            model_used=agent_config['provider'].get('default_model'),
+                            extra_data=extra_data_to_save
                         )
                         
                         # 发送AI回复
@@ -1074,6 +1165,7 @@ async def websocket_endpoint(websocket: WebSocket, user_id: str):
                                 "source": "web",
                                 "agent_id": current_agent_id,
                                 "agent_name": agent_config['agent'].get('display_name'),
+                                "tool_calls": tool_calls_record,  # v3.0: 返回工具调用记录
                                 "created_at": assistant_msg.created_at.isoformat()
                             }
                         })
diff --git a/models_v2.py b/models_v2.py
index ffbdd07..6b2da31 100644
--- a/models_v2.py
+++ b/models_v2.py
@@ -36,6 +36,9 @@ class LLMProvider(Base):
     supports_vision = Column(Boolean, default=False)  # 是否支持图片理解（多模态）
     vision_model = Column(String(100), nullable=True)  # 视觉模型名（如与默认模型不同）
     
+    # Function Calling 支持
+    supports_function_calling = Column(Boolean, default=False)  # 是否支持函数调用（工具自主调用）
+    
     # 配额和限制
     max_tokens = Column(Integer, default=4096)
     temperature = Column(Float, default=0.7)
diff --git a/services/llm_service.py b/services/llm_service.py
index 76a20d6..2209335 100644
--- a/services/llm_service.py
+++ b/services/llm_service.py
@@ -382,5 +382,200 @@ class LLMService:
             yield {"type": "content", "text": buffer}
 
 
+    async def chat_with_tools(
+        self,
+        messages: List[Dict],
+        provider_config: dict,
+        agent_config: dict,
+        tools: List[Dict] = None,
+        enable_thinking: bool = True,
+        images: List[Dict] = None
+    ) -> Tuple[str, Optional[str], Optional[List[Dict]]]:
+        """
+        支持Function Calling的对话
+        
+        Args:
+            messages: 对话历史
+            provider_config: LLM Provider配置
+            agent_config: Agent配置
+            tools: 工具定义列表（OpenAI Function Calling格式）
+            enable_thinking: 是否启用思考
+            images: 图片数据列表
+        
+        Returns:
+            Tuple[str, Optional[str], Optional[List[Dict]]]: (回复内容, 思考过程, 工具调用记录)
+        """
+        api_base = provider_config.get('api_base')
+        api_key = provider_config.get('api_key')
+        model = agent_config.get('model_override') or provider_config.get('default_model', 'auto')
+        supports_function_calling = provider_config.get('supports_function_calling', False)
+        
+        max_tokens = provider_config.get('max_tokens', 4096)
+        temperature = agent_config.get('temperature_override') or provider_config.get('temperature', 0.7)
+        
+        # 如果不支持Function Calling，直接调用普通chat
+        if not supports_function_calling or not tools:
+            response, thinking = await self.chat(messages, provider_config, agent_config, enable_thinking, images)
+            return response, thinking, None
+        
+        # 构建消息
+        final_messages = messages.copy()
+        system_prompt = agent_config.get('system_prompt', '你是一个有用的AI助手。')
+        if final_messages and final_messages[0]['role'] != 'system':
+            final_messages.insert(0, {"role": "system", "content": system_prompt})
+        
+        # 处理图片（多模态）
+        if images and len(images) > 0:
+            for i in range(len(final_messages) - 1, -1, -1):
+                if final_messages[i]['role'] == 'user':
+                    original_text = final_messages[i]['content']
+                    multimodal_content = [{"type": "text", "text": original_text if original_text else "请描述这张图片"}]
+                    for img in images:
+                        multimodal_content.append({
+                            "type": "image_url",
+                            "image_url": {"url": img['data']}
+                        })
+                    final_messages[i]['content'] = multimodal_content
+                    break
+        
+        # 第一次调用：让LLM决定是否调用工具
+        url = f"{api_base.rstrip('/')}/chat/completions"
+        headers = {
+            "Authorization": f"Bearer {api_key}",
+            "Content-Type": "application/json"
+        }
+        payload = {
+            "model": model,
+            "messages": final_messages,
+            "temperature": temperature,
+            "max_tokens": max_tokens,
+            "tools": tools  # 传入工具定义
+        }
+        
+        logger.info(f"Function Calling调用: url={url}, model={model}, tools={len(tools)}")
+        
+        tool_calls_record = []  # 记录工具调用
+        
+        try:
+            async with httpx.AsyncClient(timeout=60.0) as client:
+                response = await client.post(url, headers=headers, json=payload)
+                
+                if response.status_code != 200:
+                    logger.error(f"API返回错误: status={response.status_code}, body={response.text[:500]}")
+                    response.raise_for_status()
+                
+                data = response.json()
+                
+                if 'choices' not in data or len(data['choices']) == 0:
+                    raise ValueError("API响应格式错误：缺少choices")
+                
+                message = data['choices'][0]['message']
+                
+                # 检查是否有工具调用
+                if 'tool_calls' in message and message['tool_calls']:
+                    logger.info(f"LLM请求调用工具: {len(message['tool_calls'])} 个")
+                    
+                    # 将LLM的工具调用消息添加到历史
+                    final_messages.append({
+                        "role": "assistant",
+                        "content": None,
+                        "tool_calls": message['tool_calls']
+                    })
+                    
+                    # 记录工具调用
+                    for tc in message['tool_calls']:
+                        tool_calls_record.append({
+                            "id": tc['id'],
+                            "name": tc['function']['name'],
+                            "arguments": json.loads(tc['function']['arguments'])
+                        })
+                    
+                    # 返回工具调用记录，由调用方执行工具
+                    return None, None, tool_calls_record
+                
+                # 没有工具调用，直接返回内容
+                content = message.get('content', '')
+                
+                # 处理思考内容（如果有）
+                thinking_content = None
+                # 这里可以添加思考内容提取逻辑
+                
+                return content, thinking_content, None
+                
+        except httpx.HTTPStatusError as e:
+            logger.error(f"HTTP错误: {e.response.status_code}, {e.response.text}")
+            raise
+        except Exception as e:
+            logger.error(f"Function Calling调用异常: {type(e).__name__}: {e}")
+            raise
+    
+    async def chat_with_tool_results(
+        self,
+        messages: List[Dict],
+        provider_config: dict,
+        agent_config: dict,
+        tool_results: List[Dict],
+        enable_thinking: bool = True
+    ) -> Tuple[str, Optional[str]]:
+        """
+        第二阶段调用：将工具执行结果返回给LLM
+        
+        Args:
+            messages: 对话历史（包含工具调用和结果）
+            provider_config: LLM Provider配置
+            agent_config: Agent配置
+            tool_results: 工具执行结果 [{"tool_call_id": "xxx", "content": "..."}]
+        
+        Returns:
+            Tuple[str, Optional[str]]: (回复内容, 思考过程)
+        """
+        api_base = provider_config.get('api_base')
+        api_key = provider_config.get('api_key')
+        model = agent_config.get('model_override') or provider_config.get('default_model', 'auto')
+        max_tokens = provider_config.get('max_tokens', 4096)
+        temperature = agent_config.get('temperature_override') or provider_config.get('temperature', 0.7)
+        
+        # 将工具结果添加到消息历史
+        final_messages = messages.copy()
+        for result in tool_results:
+            final_messages.append({
+                "role": "tool",
+                "tool_call_id": result['tool_call_id'],
+                "content": result['content']
+            })
+        
+        # 调用LLM生成最终回复
+        url = f"{api_base.rstrip('/')}/chat/completions"
+        headers = {
+            "Authorization": f"Bearer {api_key}",
+            "Content-Type": "application/json"
+        }
+        payload = {
+            "model": model,
+            "messages": final_messages,
+            "temperature": temperature,
+            "max_tokens": max_tokens
+        }
+        
+        logger.info(f"工具结果返回LLM: url={url}, model={model}")
+        
+        try:
+            async with httpx.AsyncClient(timeout=60.0) as client:
+                response = await client.post(url, headers=headers, json=payload)
+                
+                if response.status_code != 200:
+                    logger.error(f"API返回错误: status={response.status_code}")
+                    response.raise_for_status()
+                
+                data = response.json()
+                content = data['choices'][0]['message']['content']
+                
+                return content, None
+                
+        except Exception as e:
+            logger.error(f"工具结果调用异常: {e}")
+            raise
+
+
 # 全局实例
 llm_service = LLMService()
\ No newline at end of file
diff --git a/templates/admin_v2/index.html b/templates/admin_v2/index.html
index 1eee3f8..f4e4f8c 100644
--- a/templates/admin_v2/index.html
+++ b/templates/admin_v2/index.html
@@ -58,8 +58,8 @@
                 </div>
                 <div class="card-body">
                     <table class="table">
-                        <thead><tr><th>名称</th><th>API地址</th><th>默认模型</th><th>思考</th><th>视觉</th><th>状态</th><th>操作</th></tr></thead>
-                        <tbody id="providers-list"><tr><td colspan="7" class="text-center">加载中...</td></tr></tbody>
+                        <thead><tr><th>名称</th><th>API地址</th><th>默认模型</th><th>思考</th><th>视觉</th><th>FC</th><th>状态</th><th>操作</th></tr></thead>
+                        <tbody id="providers-list"><tr><td colspan="8" class="text-center">加载中...</td></tr></tbody>
                     </table>
                 </div>
             </div>
@@ -164,6 +164,8 @@
             <div class="thinking-config"><div class="row"><div class="col-md-6 form-check"><input type="checkbox" class="form-check-input" id="provider-supports-thinking"><label class="form-check-label">支持原生思考</label></div><div class="col-md-6"><label class="form-label">思考模型名</label><input type="text" class="form-control" id="provider-thinking-model"></div></div></div>
             <hr><h6>视觉能力</h6>
             <div class="thinking-config"><div class="row"><div class="col-md-6 form-check"><input type="checkbox" class="form-check-input" id="provider-supports-vision"><label class="form-check-label">支持图片理解</label></div><div class="col-md-6"><label class="form-label">视觉模型名</label><input type="text" class="form-control" id="provider-vision-model" placeholder="留空则使用默认模型"></div></div><small class="text-muted mt-2 d-block">启用后可上传图片让AI识别分析内容</small></div>
+            <hr><h6>Function Calling</h6>
+            <div class="thinking-config"><div class="form-check"><input type="checkbox" class="form-check-input" id="provider-supports-function-calling"><label class="form-check-label">支持函数调用</label></div><small class="text-muted mt-2 d-block">启用后LLM可自主决定何时调用工具（更智能）</small></div>
             <div class="mt-3"><button type="button" class="btn btn-outline-primary" onclick="fetchProviderModels()"><i class="ri-refresh-line"></i> 获取模型</button><button type="button" class="btn btn-outline-secondary" onclick="testProviderConnection()"><i class="ri-link"></i> 测试连接</button></div>
             <div class="mt-2" id="provider-models-preview"></div><div class="mt-2" id="provider-test-result"></div>
         </form></div>
@@ -331,6 +333,7 @@
                 <td><strong>${p.name}</strong></td><td><small>${p.api_base||'-'}</small></td><td>${p.default_model||'auto'}</td>
                 <td>${p.supports_thinking?'<span class="badge bg-success">支持</span>':'<span class="badge bg-secondary">不支持</span>'}</td>
                 <td>${p.supports_vision?'<span class="badge bg-info">支持</span>':'<span class="badge bg-secondary">不支持</span>'}</td>
+                <td>${p.supports_function_calling?'<span class="badge bg-primary">支持</span>':'<span class="badge bg-secondary">不支持</span>'}</td>
                 <td>${p.is_active?'<span class="badge bg-success">启用</span>':'<span class="badge bg-secondary">禁用</span>'}</td>
                 <td><button class="btn btn-sm btn-outline-primary" onclick="editProvider(${p.id})"><i class="ri-edit-line"></i></button>
                     <button class="btn btn-sm btn-outline-danger" onclick="deleteProvider(${p.id},'${p.name}')"><i class="ri-delete-bin-line"></i></button></td>
@@ -349,6 +352,7 @@
             document.getElementById('provider-active').checked = true;
             document.getElementById('provider-supports-thinking').checked = false;
             document.getElementById('provider-supports-vision').checked = false;
+            document.getElementById('provider-supports-function-calling').checked = false;
             document.getElementById('provider-models-preview').innerHTML = '';
             document.getElementById('provider-test-result').innerHTML = '';
             new bootstrap.Modal(document.getElementById('providerModal')).show();
@@ -371,6 +375,7 @@
             document.getElementById('provider-thinking-model').value = p.thinking_model || '';
             document.getElementById('provider-supports-vision').checked = p.supports_vision;
             document.getElementById('provider-vision-model').value = p.vision_model || '';
+            document.getElementById('provider-supports-function-calling').checked = p.supports_function_calling;
             new bootstrap.Modal(document.getElementById('providerModal')).show();
         }
 
@@ -389,7 +394,8 @@
                 supports_thinking: document.getElementById('provider-supports-thinking').checked,
                 thinking_model: document.getElementById('provider-thinking-model').value,
                 supports_vision: document.getElementById('provider-supports-vision').checked,
-                vision_model: document.getElementById('provider-vision-model').value
+                vision_model: document.getElementById('provider-vision-model').value,
+                supports_function_calling: document.getElementById('provider-supports-function-calling').checked
             };
             const res = await fetch(id ? `/api/v2/providers/${id}` : '/api/v2/providers', { method: id ? 'PUT' : 'POST', headers: {'Content-Type':'application/json'}, body: JSON.stringify(data) });
             const result = await res.json();
diff --git a/templates/index.html b/templates/index.html
index 3beab64..15163cb 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -131,39 +131,9 @@
         /* 快捷语句 - 横向扁平 */
         .quick-phrases-bar { display: flex; align-items: center; gap: 8px; margin-top: 12px; position: relative; }
         
-        /* 工具折叠面板 - 放在输入行内 */
-        .tools-collapsible { position: relative; }
-        .tools-toggle-btn { 
-            width: 40px; height: 40px; background: #f5f5f5; border: 1px solid #e0e0e0; border-radius: 8px; 
-            cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 16px; color: #666;
-            transition: all 0.2s; position: relative;
-        }
-        .tools-toggle-btn:hover { background: #e8e8e8; border-color: #10a37f; color: #10a37f; }
-        .tools-toggle-btn.active { background: #e8f5e9; border-color: #10a37f; color: #10a37f; }
-        .tools-badge { 
-            position: absolute; top: -4px; right: -4px;
-            background: #10a37f; color: white; font-size: 10px; padding: 1px 4px; border-radius: 10px; 
-            min-width: 14px; text-align: center;
-        }
-        .tools-panel { 
-            display: none; position: absolute; bottom: 100%; left: 0; margin-bottom: 8px;
-            background: white; border: 1px solid #e0e0e0; border-radius: 12px; 
-            box-shadow: 0 4px 20px rgba(0,0,0,0.15); min-width: 180px; z-index: 100;
-        }
-        .tools-panel.show { display: block; }
-        .tools-panel-header { 
-            display: flex; justify-content: space-between; align-items: center; 
-            padding: 10px 14px; border-bottom: 1px solid #eee; font-weight: 500; color: #333; font-size: 13px;
-        }
-        .tools-panel-header button { background: none; border: none; color: #999; cursor: pointer; padding: 2px; }
-        .tools-panel-header button:hover { color: #666; }
-        .tools-panel-content { padding: 10px 14px; max-height: 280px; overflow-y: auto; }
-        .tool-item { display: flex; align-items: center; gap: 6px; padding: 6px 0; }
-        .tool-item input { width: 14px; height: 14px; }
-        .tool-item label { cursor: pointer; font-size: 13px; color: #333; display: flex; align-items: center; gap: 4px; }
-        .tool-item label i { color: #10a37f; font-size: 14px; }
-        .tool-item.disabled { opacity: 0.5; }
-        .tool-item.disabled label { color: #999; cursor: not-allowed; }
+        /* 工具调用记录显示 */
+        .tool-call-record { margin-top: 8px; padding: 8px 12px; background: #e8f5e9; border-radius: 8px; font-size: 12px; color: #10a37f; }
+        .tool-call-record i { margin-right: 4px; }
         .add-phrase-btn { padding: 6px 10px; background: #f0f0f0; border: 1px solid #ddd; border-radius: 6px; cursor: pointer; font-size: 12px; color: #666; white-space: nowrap; flex-shrink: 0; }
         .add-phrase-btn:hover { background: #e8e8e8; }
         .phrase-list-wrapper { flex: 1; overflow-x: auto; overflow-y: hidden; scrollbar-width: thin; }
@@ -212,7 +182,7 @@
     
     <div class="main-content">
         <div class="chat-header">
-            <h1>AI 对话 v2.0</h1>
+            <h1>AI 对话 v3.0</h1>
             <div class="header-controls">
                 <div class="agent-selector">
                     <select id="agentSelect" onchange="switchAgent()"><option value="">加载中...</option></select>
@@ -230,20 +200,6 @@
                 <div class="input-row">
                     <input type="file" id="fileInput" multiple accept="image/*,.pdf,.txt,.md,.json,.csv,.doc,.docx" style="display:none" onchange="handleFileUpload(event)">
                     <button class="upload-btn" onclick="document.getElementById('fileInput').click()" title="上传文件"><i class="ri-attachment-2"></i></button>
-                    <!-- 工具按钮放附件右边 -->
-                    <div class="tools-collapsible">
-                        <button class="tools-toggle-btn" onclick="toggleToolsPanel()" title="工具设置">
-                            <i class="ri-tools-line"></i>
-                            <span class="tools-badge" id="toolsBadge" style="display:none;">0</span>
-                        </button>
-                        <div class="tools-panel" id="toolsPanel">
-                            <div class="tools-panel-header">
-                                <span>工具设置</span>
-                                <button onclick="toggleToolsPanel()"><i class="ri-close-line"></i></button>
-                            </div>
-                            <div class="tools-panel-content" id="toolsPanelContent"></div>
-                        </div>
-                    </div>
                     <textarea id="messageInput" placeholder="输入消息..." rows="1"></textarea>
                     <button class="send-btn" id="sendBtn" onclick="sendMessage()"><i class="ri-send-plane-fill"></i></button>
                 </div>
@@ -324,7 +280,6 @@
         
         document.addEventListener('DOMContentLoaded', () => {
             loadProviders();  // 加载大模型池
-            loadToolsData();  // 加载工具列表
             loadAgents();
             loadQuickPhrases();
             connectWebSocket();
@@ -359,117 +314,6 @@
             return agentTools.includes(toolType);
         }
         
-        // 获取当前Agent不支持的工具列表（用户已启用但Agent不支持）
-        function getUnsupportedTools() {
-            const unsupported = [];
-            // 检查所有工具checkbox（排除disabled的）
-            const toolCheckboxes = document.querySelectorAll('.tool-checkbox:not([disabled])');
-            toolCheckboxes.forEach(cb => {
-                if (cb.checked) {
-                    // 检查Agent是否支持
-                    if (!checkAgentToolSupport(cb.dataset.toolType)) {
-                        // 获取工具显示名称
-                        const label = cb.closest('.tool-item')?.querySelector('label')?.textContent?.trim() || cb.dataset.toolType;
-                        unsupported.push(label);
-                    }
-                }
-            });
-            return unsupported;
-        }
-        
-        // 渲染工具选择区域（根据系统工具列表）
-        function renderToolToggles() {
-            const container = document.getElementById('toolsPanelContent');
-            if (!container || toolsData.length === 0) return;
-            
-            // 获取当前Agent支持的工具
-            const agent = agents.find(a => a.id === currentAgentId);
-            const agentTools = agent?.tools || [];
-            
-            // 渲染工具checkbox列表
-            let html = '';
-            toolsData.filter(t => t.is_active).forEach(t => {
-                const toolType = t.tool_type || 'unknown';
-                const isSupported = agentTools.includes(toolType);
-                const icon = getToolIconFrontend(toolType);
-                const disabledClass = isSupported ? '' : 'disabled';
-                html += `<div class="tool-item ${disabledClass}">
-                    <input type="checkbox" class="tool-checkbox" id="tool-${toolType}" data-tool-type="${toolType}" ${isSupported ? 'checked' : ''} ${!isSupported ? 'disabled' : ''} onchange="showToolWarning()">
-                    <label for="tool-${toolType}"><i class="${icon}"></i> ${t.name}</label>
-                </div>`;
-            });
-            
-            container.innerHTML = html || '<div class="text-muted" style="padding:8px;">暂无可用工具</div>';
-            
-            // 更新工具数量badge
-            updateToolsBadge();
-        }
-        
-        // 更新工具数量badge
-        function updateToolsBadge() {
-            const badge = document.getElementById('toolsBadge');
-            const selectedCount = document.querySelectorAll('.tool-checkbox:checked').length;
-            if (selectedCount > 0) {
-                badge.textContent = selectedCount;
-                badge.style.display = 'inline';
-            } else {
-                badge.style.display = 'none';
-            }
-        }
-        
-        // 切换工具面板显示
-        function toggleToolsPanel() {
-            const panel = document.getElementById('toolsPanel');
-            const btn = document.querySelector('.tools-toggle-btn');
-            panel.classList.toggle('show');
-            btn.classList.toggle('active');
-        }
-        
-        // 前端工具图标
-        function getToolIconFrontend(toolType) {
-            const icons = {
-                'search': 'ri-search-line',
-                'calculator': 'ri-calculator-line',
-                'code': 'ri-code-line',
-                'image': 'ri-image-line',
-                'web': 'ri-global-line'
-            };
-            return icons[toolType] || 'ri-tools-line';
-        }
-        
-        // 加载工具列表
-        let toolsData = [];
-        async function loadToolsData() {
-            try {
-                const res = await fetch('/api/v2/tools');
-                const data = await res.json();
-                toolsData = data.tools || [];
-                renderToolToggles();
-            } catch (e) { console.error('加载工具列表失败:', e); }
-        }
-        
-        // 显示工具不支持提示
-        function showToolWarning() {
-            updateToolsBadge();  // 更新badge数量
-            
-            const unsupported = getUnsupportedTools();
-            const warningDiv = document.getElementById('tool-warning-tip');
-            
-            if (unsupported.length > 0) {
-                const agent = agents.find(a => a.id === currentAgentId);
-                const agentName = agent?.display_name || agent?.name || '当前Agent';
-                const msg = `<i class="ri-alert-line"></i> <strong>${agentName}</strong> 不支持 <strong>${unsupported.join('、')}</strong> 工具，请关闭或切换Agent`;
-                
-                warningDiv.innerHTML = msg;
-                warningDiv.style.display = 'block';
-                // 禁用发送按钮
-                document.getElementById('sendBtn').disabled = true;
-            } else {
-                warningDiv.style.display = 'none';
-                document.getElementById('sendBtn').disabled = false;
-            }
-        }
-        
         // 加载Agent
         async function loadAgents() {
             try {
@@ -479,10 +323,6 @@
                 const defaultAgent = agents.find(a => a.is_default) || agents[0];
                 if (defaultAgent) currentAgentId = defaultAgent.id;
                 renderAgentSelect();
-                // 加载后检查工具支持
-                showToolWarning();
-                // 渲染工具选择区域
-                renderToolToggles();
             } catch (e) { console.error('加载Agent失败:', e); }
         }
         
@@ -505,8 +345,6 @@
                 if (ws?.readyState === WebSocket.OPEN) ws.send(JSON.stringify({ action: 'switch_agent', agent_id: currentAgentId }));
                 await createNewConversation();
                 showAgentSwitchNotice();
-                // 切换Agent后检查工具支持
-                showToolWarning();
             }
         }
         
@@ -1208,16 +1046,6 @@
                 return;
             }
             
-            // 检查工具支持
-            const unsupported = getUnsupportedTools();
-            if (unsupported.length > 0) {
-                const agent = agents.find(a => a.id === currentAgentId);
-                const agentName = agent?.display_name || agent?.name || '当前Agent';
-                alert(`⚠️ ${agentName} 不支持 ${unsupported.join('、')} 工具\n\n请关闭不支持的工具，或切换到支持该工具的Agent。`);
-                document.getElementById('sendBtn').disabled = false;
-                return;
-            }
-            
             document.getElementById('sendBtn').disabled = true;
             input.value = '';
             input.style.height = 'auto';
@@ -1230,13 +1058,7 @@
             pendingFiles = [];
             document.getElementById('filePreviewArea').innerHTML = '';
             
-            // 获取禁用的工具列表（所有系统工具 - 用户选中的工具）
-            const disabledTools = [];
-            const allToolTypes = toolsData.filter(t => t.is_active).map(t => t.tool_type);
-            const selectedTools = Array.from(document.querySelectorAll('.tool-checkbox:checked')).map(cb => cb.dataset.toolType);
-            allToolTypes.forEach(t => {
-                if (!selectedTools.includes(t)) disabledTools.push(t);
-            });
+            // v3.0: Function Calling模式，不再需要 disabled_tools
             
             // 发送消息（包含文件）
             if (ws?.readyState === WebSocket.OPEN) {
@@ -1245,7 +1067,6 @@
                     message: msg, 
                     conversation_id: currentConversationId, 
                     agent_id: currentAgentId,
-                    disabled_tools: disabledTools,
                     files: lastSentFiles || []  // 发送的文件列表
                 }));
             }