Have you read the extension description? There's an explanation of all the commands the extension provides and a description where to find them. Just claiming there's no description, but not saying on what you're failing makes this rating quite useless to me, because I don't know what to improve. Thanks for your feedback anyhow.
There is no description how to use this Node Annotator. That is why I have given it one star, because it makes this plugin totally worthless!