Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure, but it only states the action. It does not mention whether the operation is destructive, how scale interacts with width/height, whether aspect ratio is preserved, or what happens when conflicting parameters are supplied.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.