Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden for behavioral disclosure. It mentions 'single portable token' but fails to describe token format, length, or whether the export has side effects (e.g., deleting the original). The incomplete sentence leaves out important details about what exactly the token is.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.