Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, covering the safety profile. The description adds that the returned data is a 'structured profile' and that the slug must be exact from search_fish, which is useful but not substantial beyond the annotations. No contradiction present.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.