Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, openWorldHint=true and destructiveHint=false, so safety profile is largely covered. The description adds the 'temporary' qualifier, which reconciles reasonably with destructiveHint=false (removing a temp account is not data destruction), but it discloses nothing about the confirm gate, permissions, or reversibility.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.