update

app/core/tools/file_search_tool.py

@@ -147,7 +147,7 @@ class FileSearchTool(BaseTool):
         if (self.__keys and len(self.__keys) > 0) or (
             self.__dirkeys and len(self.__dirkeys) > 0
         ):
-            return ""
+            return 'You can use the "retrieval" tool to search for relevant context whenever the need for search or information retrieval is mentioned.'
         else:
             return ""