Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The readOnlyHint annotation already declares this as a read-only operation. The description adds minimal behavior beyond that—it identifies the resource scope ('in an NKS cluster') but doesn't disclose any additional traits like pagination, filtering, or required cluster UUID context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.