Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotation already declares readOnlyHint=true and destructiveHint=false, and the description adds a valuable note about the return format (raw array, no paging wrapper). Given there is no output schema, this behavioral detail is important and goes 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.