Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the burden and usefully discloses default states: email on unless disabled, text off by default, and texts not yet sent. It also establishes authorization scope ('your own settings only'), though it does not explicitly characterize read-only behavior or permissions.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.