Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, and destructiveHint, so the safe-read nature is fully covered. The description adds only that the result is a 'compiled prompt scaffold', which is light behavioral context. There is no contradiction with annotations, but no deeper disclosure of error or caching behavior is provided.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.