Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate this is not read-only, not idempotent, and not destructive. The description adds meaningful context by specifying that the verification checks TXT and MX records and by limiting the action to registered domains. It does not contradict the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.