Update app.py

app.py

@@ -23,6 +23,7 @@ class CustomSearchTool(Tool):
     def __init__(self, search_tool):
         super().__init__()
         self.search_tool = search_tool
+        self.description = "A custom search tool that uses DuckDuckGo to perform web searches."
 
     def run(self, query):
         return self.search_tool.run(query)