Update app.py

app.py

@@ -9,14 +9,15 @@ 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:str, arg2:int)-> str: #it's import to specify the return type
+def my_custom_tool(arg1:int, arg2:int)-> int: #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 does nothing yet 
+    """A calculator to perform addition, subtraction and multiplication. 
     Args:
-        arg1: the first argument
-        arg2: the second argument
+        arg1: the first argument (e.g., 2)
+        arg2: the second argument (e.g., 5)
     """
-    return "What magic will you build ?"
+    
+    return a + b or a-b or a*b
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: