Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. It discloses a key behavior — that no saving occurs — which is important for a close operation. But it does not mention that the image is unloaded/closed, that unsaved changes are lost, or whether the operation is reversible or destructive, leaving gaps in the behavioral picture.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.