fix

app.py

@@ -14,7 +14,14 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 # --- Tool Definitions ---
 @tool
 def calculator(expression: str) -> str:
-    """Calculate mathematical expressions"""
+    """Calculate mathematical expressions
+    
+    Args:
+        expression: The mathematical expression to evaluate as a string
+    
+    Returns:
+        The result of the calculation as a string
+    """
     try:
         return str(eval(expression))
     except Exception as e:
@@ -22,7 +29,14 @@ def calculator(expression: str) -> str:
 
 @tool
 def reverse_text(text: str) -> str:
-    """Reverse text (for handling backwards text questions)"""
+    """Reverse text (for handling backwards text questions)
+    
+    Args:
+        text: The text to reverse
+    
+    Returns:
+        The reversed text
+    """
     return text[::-1]
 
 # --- GAIA Agent Implementation ---