Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, idempotentHint=true, and destructiveHint=false, covering the write, idempotent, and non-destructive nature. The description adds no extra behavioral context such as side effects, permission requirements, or behavior for unspecified fields, so it provides minimal value beyond the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.