Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It only states that notes are deleted based on a match; it does not explain scope (current pattern, selection, or whole project), exact matching semantics, irreversibility, or what happens to non-matching or malformed entries.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.