Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description usefully enumerates the three terminal states (generating / completed with the model / failed) and discloses that the preview polls it automatically, which is real context beyond the schema. However, the annotations declare readOnlyHint=false and idempotentHint=false for what reads as a pure status poll, and the description does not reconcile that or state polling/rate expectations, so the behavioral picture stays incomplete.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.