Update tools.py

tools.py

@@ -50,7 +50,7 @@ class Mail_retriever(Tool):
                             result=part.get_payload()
                 elif message_main_type == 'text':
                     result=mail_content.get_payload()
-                return f"{names}, you have new mails: {result}."
+                return f"{name}, you have new mails: {result}."
         except HttpError as error:
             # TODO(developer) - Handle errors from gmail API.
             print(f"An error occurred: {error}")