Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description carries the full burden of disclosing behavior. 'Search entities' only implies a read operation; it does not state whether the search spans all entity types, how results are returned, whether pagination exists, or that campaignId scopes the search. It does not contradict any annotations, but it provides almost no behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.