Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description clearly implies a mutating action and tells the agent what gets removed (shadows, blurs, and other effects). With no annotations, the description carries the full burden, but it does not disclose whether the change is reversible, what exact effect types are covered, or whether only the node itself is affected.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.