Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the burden of disclosing behavior, but it merely restates the tool name. It does not explain what 'disabled' means, whether the selection is cumulative, or if any prerequisites exist. This is a minimal disclosure with no added context beyond the name.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.