This is a useful way to frame it — a check that can change things isn't really a check, it's already the first half of the action. The sequence you describe, analyze, then preview, then confirmation, then execution, is what makes an agent publishing tool feel safe enough to actually use on a live site.
For a small site owner, the risk is almost never a dramatic failure. It's a quiet overwrite — opening hours, a phone number, a page that was fine yesterday — and not noticing until a customer does. Keeping payment on a Stripe-hosted page and requiring a code before a mail address is activated follows the same logic: keep the sensitive step separate from the agent's ordinary work. Thanks for laying the flow out clearly and noting the pricing is per site.