Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description must carry the full burden of behavioral disclosure. It only states 'Create a new organization_unit', which merely repeats the tool name. It does not mention side effects, required data fields, authentication needs, or response behavior, making it inadequate for an agent to anticipate consequences.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.