Design a dedicated, read-only reviewer node with real authority to reject and route work back, separate from the nodes that produce it — the graph-level equivalent of loop-verifier-design's "don't let an agent self-verify" principle, now backed by academic evidence that orchestration-level (decoupled) verification measurably improves output quality. Use when a multi-agent graph has no explicit review/verification node, when a "reviewer" node exists but can't actually reject or route work, or when designing the conditional edge that decides pass vs. loop-back.
