Update app.py

app.py

@@ -33,6 +33,20 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 # --- Excel Reading Tool ---
 @tool
 def read_excel_tool(file_path: str) -> str:
+    """
+    Reads the contents of an Excel (.xlsx) or CSV (.csv) file and returns the first 10 rows as a formatted string.
+
+    Parameters:
+        file_path (str): The full path to the Excel or CSV file.
+
+    Returns:
+        str: A string representation of the first 10 rows of the file, or an error message if reading fails.
+
+    Notes:
+        - CSV files are read using pandas.read_csv().
+        - Excel files are read using pandas.read_excel().
+        - Index column is omitted from the output for readability.
+    """
     try:
         if file_path.endswith('.csv'):
             df = pd.read_csv(file_path)
@@ -41,7 +55,8 @@ def read_excel_tool(file_path: str) -> str:
         return df.head(10).to_string(index=False)
     except Exception as e:
         return f"Error reading file: {str(e)}"
-        
+
+# --- Agent defining Class ---        
 class BasicAgent:
     def __init__(self):
         print("BasicAgent initialized.")