Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, idempotentHint=false, destructiveHint=false, and openWorldHint=true, so the safety profile is covered. The description adds one piece of genuinely new context – that the call consumes ElevenLabs credits – but says nothing about permissions, reversibility of the update, or which fields can change.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.