diff --git a/README.md b/README.md
index 0c16ac5..bd32b43 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,9 @@ MCP_ENDPOINT=<OBSOLETE>
 LANGSMITH_API_KEY=<LANG SMITH API KEY> # for testing only; location of where dataset is stored
 ```
 
+### Hardware tools
+update the link to xiaozhi server in `configs/mcp_config.json`
+
 ## 运行服务
 
 ```bash