Update app.py

app.py

@@ -6,6 +6,8 @@ from dotenv import load_dotenv
 from langchain_core.tools import Tool
 from langchain_groq import ChatGroq
 from langgraph.prebuilt import create_react_agent
+from langchain.agents import create_tool_calling_agent
+from langchain.tools import convert_to_openai_tool
 
 load_dotenv()
 
@@ -70,18 +72,24 @@ class MCPClient:
 _agent_executor = None
 
 async def get_agent_executor():
-    """Initializes and returns the agent executor, ensuring it's a singleton."""
     global _agent_executor
     if _agent_executor is None:
         if not os.getenv("GROQ_API_KEY"):
             raise ValueError("GROQ_API_KEY secret not set.")
+        
         client = MCPClient(command=sys.executable, args=["server.py"])
-        tools = await client.get_tools()
+        
+        tools_raw = await client.get_tools()
+        tools = [convert_to_openai_tool(t) for t in tools_raw]   # 🟢 Key Fix
+        
         model = ChatGroq(model="openai/gpt-oss-20b")
-        _agent_executor = create_react_agent(model, tools)
+        
+        _agent_executor = create_tool_calling_agent(model, tools)  # 🟢 Key Fix
+    
     return _agent_executor
 
 
+
 # --- Gradio Chat Logic ---
 async def respond_to_chat(message: str, history: list):
     agent = await get_agent_executor()