Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must carry the behavioral disclosure burden. 'Search' implies a read-only operation, but the description does not disclose pagination behavior, how the query is matched, result ordering, response shape, or any other operational traits. This is a minimal disclosure and leaves too much unspecified.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.