Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The readOnlyHint annotation already establishes the read-only nature, and the description merely restates that without adding new behavioral details. There is no mention of what happens for missing contacts, response shape, or any side effects, but it does not contradict the annotation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.