Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Beyond the annotations it discloses that a model is invoked per scenario, that null means undecided, the PASS/FAIL/PARTIAL verdict space, and that validate_only is deterministic with no model call or key. The distinction that expectations are hard assertions while evaluators produce the score is genuinely useful behavioral context; it does not, however, discuss cost, latency, or partial-run failure behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.