Update app.py

Corrected the agent call function

app.py

@@ -45,11 +45,11 @@ class BasicAgent:
             contents=question,
             config=types.GenerateContentConfig(
                 tools=[types.Tool(
-                    google_search_retrieval=types.GoogleSearchRetrieval()
+                    google_search=types.GoogleSearch()
                 )]
             )
         )
-        return response
+        return response.text
 
 def run_and_submit_all( profile: gr.OAuthProfile | None):
     """