Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full responsibility for behavioral disclosure but offers none. 'Update' implies a mutation operation, but there's no information about permissions required, whether changes are destructive or reversible, rate limits, error conditions, or what the tool returns. This leaves the agent completely in the dark about behavioral traits.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.