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. It mentions that the QR code is static and without a fixed value, but it does not disclose whether the operation has side effects (e.g., creating a record), requires specific permissions, or how the output is delivered. This is insufficient for an agent to anticipate the tool's behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.