diff --git a/mempalace/mcp_server.py b/mempalace/mcp_server.py
index f0973d3..fa69aa5 100644
--- a/mempalace/mcp_server.py
+++ b/mempalace/mcp_server.py
@@ -2053,7 +2053,11 @@ def handle_request(request):
             return {
                 "jsonrpc": "2.0",
                 "id": req_id,
-                "result": {"content": [{"type": "text", "text": json.dumps(result, indent=2, ensure_ascii=False)}]},
+                "result": {
+                    "content": [
+                        {"type": "text", "text": json.dumps(result, indent=2, ensure_ascii=False)}
+                    ]
+                },
             }
         except Exception:
             logger.exception(f"Tool error in {tool_name}")