fix: add type annotation

app.py

@@ -8,7 +8,7 @@ from tools.final_answer import FinalAnswerTool
 from Gradio_UI import GradioUI
 
 @tool
-def show_internet_location(public_ip)-> str:
+def show_internet_location(public_ip: str)-> str:
     """A tool that shows location based on IP address.
     Args:
         public_ip: IP address from user request