tool update

app.py

@@ -28,7 +28,7 @@ tools = [wiki_ret, arxiv_ret, tavily_ret, handle_file_tool]
 llm = ChatGroq(api_key=groq_api_key, model="gemma2-9b-it")
 llm_with_tools = llm.bind_tools(tools)
 class GraphState(TypedDict):
-    messages: Annotated[Dict, operator.add]
+    messages: str #Annotated[Dict, operator.add]
     context: str
 
 # --- Basic Agent Definition ---