Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations include idempotentHint and openWorldHint, which already indicate retry safety and flexible schema. The description adds minimal behavioral context beyond the id requirement; it does not disclose whether updates merge or replace fields, how missing IDs are handled, or any side effects. No contradiction with annotations, but the added value is low.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.