Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description fully bears the burden of behavioral disclosure. It only states 'List available Multipass aliases.' It does not mention whether authentication is required, if the list is read-only, or any side effects. For a simple list operation, the lack of detail is still a gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.