Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must carry the full burden of transparency. It only states 'Get details,' which implies a read operation, but it doesn't disclose potential failures, permission requirements, or the scope of 'details,' missing important 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.