Fix: When editing an Agent, selecting custom tools does not allow filtering by labels. (#6197)

Co-authored-by: dufei <du_fei@venusgroup.com.cn>

api/services/tools/api_tools_manage_service.py

@@ -429,6 +429,7 @@ class ApiToolManageService:
                 db_provider=provider,
                 decrypt_credentials=True
             )
+            user_provider.labels = labels
 
             # add icon
             ToolTransformService.repack_provider(user_provider)