Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Beyond the annotations, the description discloses important behavior: the original is untouched, the copy counts against the project cap, and no credits are spent. It also clarifies that artwork is carried over, which helps the agent set user expectations accurately.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.