Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, and destructiveHint: false, so the safety profile is covered. The description adds context by specifying the data source (Open Targets) and the exact return fields, but it does not disclose rate limits, auth requirements, or any subtle behaviors. This adds some value but not rich behavioral detail.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.