Update app.py

app.py

@@ -10,7 +10,14 @@ from Gradio_UI import GradioUI
 #Marathon training plan
 @tool
 def estimate_marathon_time(marathon_time: str) -> str:
-    """Estimates a full marathon time based on a given marathon time."""
+    """Estimates a full marathon time based on a given marathon time.
+    
+    Args:
+        marathon_time (str): The marathon time in HH:MM format.
+    
+    Returns:
+        str: The estimated marathon time.
+    """
     try:
         hours, minutes = map(int, marathon_time.split(":"))
         total_minutes = hours * 60 + minutes