Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses the returned fields and implies a read-only metadata operation, but does not mention error conditions, authentication, rate limits, or whether the episode must exist. For a simple getter, this is acceptable but not deeply transparent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.