Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must carry the behavioral burden. 'Get' implies a read-only operation, but the text never explicitly states that it makes no changes, has no auth requirements, or is safe to call repeatedly. It is minimally transparent but not richly so.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.