Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=false, and destructiveHint=false, so the safety and idempotency profile is fully covered by structured data. The description adds a small amount of context by implying it returns detail rather than summary data, but doesn't describe what fields are returned, error behavior for invalid IDs, or whether it requires authentication.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.