Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations at all, so the description carries the full load: it does disclose the mutation target (the active sequence) and the downstream consumer (export with range 'inOut'), which is real value beyond the name. It does not explain partial-update semantics despite both parameters being optional, nor error behavior (e.g., inPoint > outPoint), leaving a meaningful gap for an unannotated mutation tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.