added the custom tool

app.py

@@ -9,14 +9,49 @@ 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
-    #Keep this format for the description / args / args description but feel free to modify the tool
-    """A tool that does nothing yet 
+def my_custom_tool(current_time: int) -> str:
+    """
+    A tool that checks how many minutes ago the latest eruption
+    of Old Faithful occurred using the GeyserTimes API.
+
     Args:
-        arg1: the first argument
-        arg2: the second argument
+        current_time: current Unix epoch time (seconds)
+
+    Returns:
+        Human-readable string with elapsed minutes.
     """
-    return "What magic will you build ?"
+
+    url = "https://www.geysertimes.org/api/v5/entries_latest/old+faithful?iso=1"
+
+    response = requests.get(url, timeout=10)
+    data = response.json()
+
+    if not data or "entries" not in data or not data["entries"]:
+        raise Exception("Problem retrieving eruption data")
+
+    first_entry = data["entries"][0]
+
+    eruption_time_str = first_entry.get("time")
+
+    if eruption_time_str is None:
+        raise Exception("No eruption time found")
+
+    # Parse API ISO datetime
+    eruption_dt = datetime.datetime.fromisoformat(eruption_time_str)
+
+    # Ensure timezone-aware
+    if eruption_dt.tzinfo is None:
+        eruption_dt = pytz.UTC.localize(eruption_dt)
+
+    # Convert current_time into datetime
+    current_dt = datetime.datetime.fromtimestamp(current_time, tz=pytz.UTC)
+
+    # Difference
+    delta = current_dt - eruption_dt
+
+    minutes_ago = int(delta.total_seconds() // 60)
+
+    return f"Old Faithful last erupted {minutes_ago} minutes ago."
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: