feat: add MCP tool integration

backend/services/tool_resources.py

@@ -0,0 +1,21 @@
+"""Shared serialization helpers for reusable tool resources."""
+
+from db.models import Tool
+from schemas import ToolOut
+from services.masking import mask_secrets
+
+
+def tool_to_out(tool: Tool) -> ToolOut:
+    return ToolOut(
+        id=tool.id,
+        name=tool.name,
+        function_name=tool.function_name,
+        type=tool.type,  # type: ignore[arg-type]
+        description=tool.description,
+        definition=tool.definition,
+        secrets=mask_secrets(tool.secrets or {}),
+        status=tool.status,  # type: ignore[arg-type]
+        mcp_server_id=tool.mcp_server_id,
+        remote_tool_name=tool.remote_tool_name,
+        updated_at=tool.updated_at.isoformat() if tool.updated_at else None,
+    )