Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=false, so the read-only, closed-domain profile is covered. The description adds the enumeration of status states (awaiting payment, queued, shipped), but that is return-shape information duplicated by the output schema, and it discloses no permission, freshness, or lookup-failure behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.