Update app.py

app.py

@@ -18,7 +18,7 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return
     """
     return "What magic will you build ?"
 
-    @tool
+@tool
 def get_joke() -> str:
     """
     Fetches a random joke from the JokeAPI.