Live turns the model out of shadow. It defaults to FALSE on every call, so going live is always an explicit act and never a side effect of changing a number. Setting it requires an ADMIN of this organisation. Arming decides whether the model may change an outcome at all — a payment frozen, a grant refused — for every customer this organisation has, which is a governance act rather than a tuning one. Stating the appetite and the sample needs no admin.
Review is the share of the stream that may be sent for examination, in (0, 0.5]. The alert threshold is derived from it as a quantile of the scores actually observed, so the level is governed rather than tuned.
Sample is the share of below-the-line events retained for review, in 0, 1. It is the instrument that measures what the model missed; there are no labels, so nothing else can.