Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The readOnlyHint annotation already declares this is a safe read, so the "[READ]" tag and "Read" verb repeat structured data rather than adding to it. Nothing is said about errors for an unknown policy_id, required permissions, or what a policy record looks like, which is the extra context the description should supply for a tool with no output schema.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.