Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Beyond the annotations, the description discloses important behavior: a new language creates a sibling project, an existing language retranslates and replaces that sibling's editable translated content while preserving its uid, and the call uses the workspace's one-click translation entitlement and may incur AI usage. This is strong transparency for a destructive operation and is consistent with destructiveHint=true.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.