Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds some useful context by indicating this is a direct slug-based lookup returning full detail rather than a search, but it does not disclose additional behaviors such as error handling or missing-slug behavior. With annotations in place, this is adequate but not rich.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.