Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must carry the behavioral burden. The active verb 'Disable' clearly signals a state-changing operation on a named resource, but it does not disclose side effects such as WHOIS contact details becoming publicly visible or whether the operation is reversible.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.