Update app.py

app.py

@@ -143,9 +143,9 @@ def chatbot_response(message, history):
     try:
         messages = [{"role": "system", "content": SYSTEM_PROMPT}]
         
-        # 添加历史(最近3轮)
+        # 添加历史(最近5轮)
         if history:
-            for item in history[-3:]:
+            for item in history[-5:]:
                 if isinstance(item, (list, tuple)) and len(item) == 2:
                     messages.append({"role": "user", "content": item[0]})
                     messages.append({"role": "assistant", "content": item[1]})
@@ -154,8 +154,8 @@ def chatbot_response(message, history):
         
         tool_calls_log = []
         
-        # LLM 调用循环(最多3轮工具调用)
-        for iteration in range(3):
+        # LLM 调用循环(最多5轮工具调用)
+        for iteration in range(5):
             response = client.chat_completion(
                 messages=messages,
                 model="Qwen/Qwen2.5-72B-Instruct:novita",
@@ -217,6 +217,7 @@ def chatbot_response(message, history):
         stream = client.chat_completion(
             messages=messages,
             model="Qwen/Qwen2.5-72B-Instruct:novita",
+            tools=MCP_TOOLS,
             max_tokens=2000,
             temperature=0.5,
             stream=True