Update app.py

app.py

@@ -20,7 +20,7 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return
     return "What magic will you build ?"
 
 @tool
-def get_thought_of_the_day():
+def get_thought_of_the_day()-> str:
     """
     A tool that fetches the random inspirational quote
     """