Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must disclose behavioral traits. It only states 'List all resource pools' without mentioning read-only nature, required permissions, or output format. The presence of an output schema mitigates this slightly, but the description adds no transparency beyond the literal action.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.