Update app.py

app.py

@@ -171,7 +171,14 @@ async def chat(request: ChatRequest):
                     messages.append({
                         "role": "assistant",
                         "content": None,
-                        "tool_calls": [tool_call]
+                        "tool_calls": [{
+                            "id": tool_call.id,
+                            "type": "function",
+                            "function": {
+                                "name": tool_call.function.name,
+                                "arguments": tool_call.function.arguments
+                            }
+                        }]
                     })
                     messages.append({
                         "role": "tool",