how to resolve oh unable to start connecting to mcp server

I have tried configuring a example mcp server into ~/.openharness/settings.json as below:

"mcp_servers": { "mcp-mini": { "type": "http", "url": "http://127.0.0.1:3000/jsonrpc" } },

But after start oh with oh --verbose --debug, oh seems does not even start connecting to my example mcp server.

Please advise how to resolve this issue. (Am I configuring mcp server incorrectly? If yes, please advise any working mcp_server config example)

Thanks.

BTW, I can successfully installed this example mcp server in vs code using code --add-mcp '{"name":"mcp-mini","type":"http","url":"http://127.0.0.1:3000/jsonrpc"}'