Update app.py

app.py

@@ -9,13 +9,14 @@ from Gradio_UI import GradioUI
 
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
-def my_custom_tool(arg1:int)-> int: #it's import to specify the return type
+def my_custom_tool(arg1:int)-> str: #it's import to specify the return type
     #Keep this format for the description / args / args description but feel free to modify the tool
     """A tool that convert a decimal number to hexadecimal.
     Args:
         arg1: the decimal number that we want to convert
     """
-    return hex(arg1)
+    result = hex(arg1)
+    return result
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: