Human in the Loop vs Human on the Loop: Where to Put the Gate
Human in the loop means AI recommends and the workflow pauses for approval; human on the loop means AI executes within policy while a person monitors exceptions. Choose the gate with three questions: can it be undone, how far can a mistake spread, and can you verify it quickly from the context shown. In n8n a gated tool pauses the run and shows tool name and parameters for Approve or Deny via Slack, Telegram, email, Teams, and other chat channels. Move from blocking to supervised only after evidence of high human-AI agreement, stable operation, and error rates inside tolerance. Always log reviewer identity, decision, timestamp, tool parameters, and outcome, and auto-revert to blocking approval when rejection or exception rates rise.
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