Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must carry the behavioral disclosure burden. It implies read-only behavior via 'Get details' but does not state whether any permissions are required, what happens if the campaign does not exist, or what exactly 'details' includes. The lack of an output schema further compounds this.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.