added my code

app.py

@@ -1,3 +1,4 @@
+import http
 from smolagents import CodeAgent,DuckDuckGoSearchTool, HfApiModel,load_tool,tool
 import datetime
 import requests
@@ -9,15 +10,15 @@ 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(year: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 does nothing yet 
+    """A tool that fetches the population of USA at a specific year. Do a GET call on this API:
+    API: https://datausa.io/api/data?drilldowns=Nation&measures=Population, and get the population of the year from the response.
     Args:
-        arg1: the first argument
-        arg2: the second argument
+        year: an integer representing a year
     """
-    return "What magic will you build ?"
-
+    return http.get('https://datausa.io/api/data?drilldowns=Nation&measures=Population')
+    
 @tool
 def get_current_time_in_timezone(timezone: str) -> str:
     """A tool that fetches the current local time in a specified timezone.