Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden, and it discloses little: it does not say whether calling it when already connected errors or is a no-op, what happens if the MuseScore plugin is not running, whether it blocks or times out, or whether the connection persists across calls. The only behavioral detail given, the return shape, is already covered by the output schema.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.