Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavior disclosure. It only says 'Create a local color style,' which implies mutation but does not explain side effects, whether an existing style is overwritten, how 'local' is scoped, or what the tool returns. This is a significant transparency gap for a creation operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.