Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds the return shape ('matching indicator IDs') which is genuinely useful given no output schema, but it says nothing about rate limits, auth, or token requirements expected of an open-world search API.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.