Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It only says 'save' which implies a write, but does not reveal whether it overwrites existing branding, merges, requires specific agency state, or how it handles the optional parameters. No return value or error behavior is described.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.