The two failure modes
Over-gate an AI workflow and you've built a slow, expensive version of doing it by hand. Under-gate it and you ship a decision nobody reviewed straight into the real world. Both are common; both are avoidable with one question asked per step.
The rule: gate on consequence, not on doubt
Put a human gate where a wrong action is expensive and hard to reverse — sending money, emailing a customer, deleting data, publishing. Let the automation run free where mistakes are cheap and recoverable — drafting, sorting, summarizing, proposing. The question isn't 'is the AI sure?' It's 'what happens if it's wrong?'
Making the gate fast
A gate is only worth it if approving is quick. The interface should give the reviewer exactly what they need to decide — the proposed action, the reasoning, the data behind it — and one clear way to approve or reject. Done well, a human gate adds seconds, not friction, and turns an untrustworthy automation into one you'd actually deploy.
Have something to ship?
Start with a fixed-price, two-week MVP — or scope a full build with a senior team.