Update app.py

Add custom tool functionality.

app.py

@@ -1,4 +1,4 @@
-from smolagents import CodeAgent,DuckDuckGoSearchTool, HfApiModel,load_tool,tool
+from smolagents import CodeAgent, DuckDuckGoSearchTool, HfApiModel, load_tool, tool
 import datetime
 import requests
 import pytz
@@ -9,14 +9,22 @@ 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 read_excel_file(filePath:str, allSheets:bool = True) -> 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 reads an Excel file from a given path and returns the total
+    number of worksheets or the title of the active worksheet.
     Args:
-        arg1: the first argument
-        arg2: the second argument
+        filePath: file's path
+        allSheets: whether or not read all sheets, default: True
     """
-    return "What magic will you build ?"
+    import openpyxl as xl
+
+    wb = xl.load_workbook(filePath)
+
+    if allSheets:
+        return f"Workbook holds {len(wb.sheetname)} worksheets."
+    else:
+        return f"Active worksheet is {wb.active.title}"
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: