Update app.py

app.py

@@ -22,6 +22,12 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return
 
 @tool
 def wikipedia_search(query, sentences=2):
+     """A tool that search a definition on wikipedia  
+    Args:
+        arg1: the query to fetch the defition for
+        arg2: the length of the summary to provide for the defition
+    """
+    
     try:
         # Search Wikipedia for a page title
         results = wikipedia.search(query)