Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description provides no details beyond 'lock'. It does not disclose that locking an issue prevents new comments (but does not close it), or any side effects. Since there are no annotations, the description carries full burden but fails to provide 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.