Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It does add meaningful context by stating 'Disconnects MQTT and removes from config,' which informs the agent of side effects. However, it does not mention permanence, whether associated data is deleted, or any permissions required, so the transparency is partial rather than complete.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.