Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations declare readOnlyHint=false and destructiveHint=false, and the description's "put back to default" is consistent with a non-read mutation, so no contradiction. However, it never says whether the existing custom wording is permanently lost or recoverable, which is the single most important behavioral fact for a reset operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.