Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint and non-destructive behavior, so the safety profile is covered. The description adds genuinely useful context beyond that: data is live, sold-out items are omitted from the 'today' lane, and catering carries size variants.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.