Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. 'Update role configuration' implies a mutation operation but reveals nothing about required permissions, whether changes are reversible, potential side effects, error conditions, or response format. For a tool that modifies system roles with 3 parameters, this is inadequate behavioral transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.