Update app.py

app.py

@@ -19,8 +19,10 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return
     return "What magic will you build ?"
     
 @tool
-def about_author() -> str:
+def about_author(arg:str) -> str:
     """A tool that tell about the author of this space.
+    Args:
+        arg:A string representation with keyword author of this space.
     """
     return "I modified by Md. Mazharul Islam"