Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, idempotentHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered. The description adds one genuinely useful nuance — that it removes the *cached* sign-in, implying local credential removal rather than server-side token revocation — but says nothing about downstream effects such as whether later calls fail until sign-in.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.