Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must carry the behavioral profile, and it does: the tool is free, a human reads every report, and no automated side effects occur. What's missing is any note on response behavior or follow-up expectations, but the core non-destructive, human-reviewed nature is disclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.