Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate readOnlyHint=true and idempotentHint=true, covering the safety profile. The description adds only that it retrieves the 'current' cache, implying a snapshot of the present state, but does not describe any additional behavior such as pagination, response format, or the effect of the optional device parameter.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.