Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate read-only, non-destructive, and idempotent behavior, which the description does not contradict. The description adds value by specifying the linting scope ('all 10 GoSQLX style rules'), which is not covered by annotations, providing useful context about what the tool checks. However, it does not detail output format or error handling.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.