Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, which the description merely echoes by saying 'List'. It adds no behavioral context such as what scope of settings is returned, whether the account must be accessible to the caller, or any pagination/auth notes.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.