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 only states 'Get all', which indicates a read operation, but it does not disclose what the returned data looks like (e.g., names only), whether any authentication is required, or any potential rate limits. For a tool with no output schema, this leaves some ambiguity.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.