chore: update search tools descriptions

app.py

@@ -286,7 +286,7 @@ supported_tools = json.dumps(
             "type": "function",
             "function": {
                 "name": "search_on_internet",
-                "description": "Use this tool to search online, only use it for information you don't know or are unsure of, don't abuse it.",
+                "description": "Use this tool to search for information on the internet so you can provide answers to questions that require a high level of precision, or information you are unsure of. In addition, you can also refer to questions related to time, events, news or geopolitics. Don't misuse tools.",
                 "parameters": {
                     "type": "object",
                     "properties": {