Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full disclosure burden. It usefully reveals the downstream effect (sibling Slack tools stop reading) and that the change is reversible via Settings, which is real behavioral context. However, it does not state whether the Slack account/auth is untouched, whether in-flight operations are affected, or the scope of the toggle beyond Slack.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.