Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, non-destructive, closed-world, so the safety profile is covered. The description adds one genuinely new behavioral fact — retrieval does not trigger background execution — which is useful, but it says nothing about the shape of the returned workflow, whether results are static/cached, or what happens on an unknown id.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.