added type hints describe_image(path: str) -> str:

app.py

@@ -20,7 +20,7 @@ python_code_executor=PythonInterpreterTool()
 
 
 @tool
-def describe_image(path):
+def describe_image(path: str) -> str:
     """Describes the image. requires image path. return image description.
     Args: path of image
     """