Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false, covering the safety profile. The description adds 'recent' implying a time constraint but does not elaborate on bounds, pagination, or output behavior. With annotations present, the description is adequate but adds little beyond the abstract term 'attention history.'
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.