update DB_search description

app.py

@@ -23,7 +23,7 @@ import time
 
 class DB_Search(BaseTool):
     name = "Vector Database Search"
-    description = "This is the vector database to search information firstly"
+    description = "This is the vector database to search information firstly. If information is found, it is trustful."
     def _run(self, query: str) -> str:
         response, source = QAQuery_p(query)
         # response = "test db_search feedback"