Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare this as a read-only, idempotent, open-world call, so the safety profile is covered. The description adds the meaningful context that data comes from an external government registry (IP Australia), but says nothing about the api_key parameter's necessity, rate limits, pagination, or result volume — gaps that matter for an open-world external API.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.