diff --git a/modules/serviceCenter/services/serviceAgent/coreTools/_dataSourceTools.py b/modules/serviceCenter/services/serviceAgent/coreTools/_dataSourceTools.py
index 6e1ed0e1..2396560e 100644
--- a/modules/serviceCenter/services/serviceAgent/coreTools/_dataSourceTools.py
+++ b/modules/serviceCenter/services/serviceAgent/coreTools/_dataSourceTools.py
@@ -20,6 +20,21 @@ logger = logging.getLogger(__name__)
 
 def _registerDataSourceTools(registry: ToolRegistry, services):
     """Auto-extracted from registerCoreTools."""
+
+    def _buildResolverDb():
+        """Build a DB adapter that ConnectorResolver can use to load UserConnections.
+        interfaceDbApp has getUserConnectionById; ConnectorResolver expects getUserConnection."""
+        chatService = services.chat
+        appIf = getattr(chatService, "interfaceDbApp", None)
+        if appIf and hasattr(appIf, "getUserConnectionById"):
+            class _Adapter:
+                def __init__(self, app):
+                    self._app = app
+                def getUserConnection(self, connectionId: str):
+                    return self._app.getUserConnectionById(connectionId)
+            return _Adapter(appIf)
+        return getattr(chatService, "interfaceDbComponent", None)
+
     # ---- DataSource convenience tools ----
     _SOURCE_TYPE_TO_SERVICE = {
         "sharepointFolder": "sharepoint",