Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false and destructiveHint=false, so the mutation profile is partly covered. The description adds useful context that new objects are created and reported with world sizes, but it omits placement/origin behavior, coordinate handling, and how path is resolved.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.