Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint and idempotentHint, so the safety profile is covered. The description adds useful behavioral detail: results appear in 'items' with specific fields such as Partition, leading assessment relation, and length-of-stay values, and it notes that full attachment values are not included in this tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.