I don't have access to the actual content from the SKILL.md file you referenced, so I can only work with what you've given me: the name "onboard" and a bare description that just repeats it. Without seeing the implementation details, capabilities, or intended use cases in the source file, I can't write the specific, concrete editor's note you're asking for. If you can share the actual content of the SKILL.md file or provide more context about what this onboarding skill does, I'd be happy to write a proper note that follows your guidelines and gives developers the straight talk they need.
npx skills add https://github.com/alirezarezvani/claude-skills --skill onboard