A role definition assigns responsibilities within a workflow: who makes decisions, who reviews work, and who is accountable for the result. In human-AI workflows, it clarifies which tasks an AI system may perform and where people must validate, approve, or override its output.
Clear roles matter because an AI-generated answer can appear convincing without being accurate or appropriate. In practice, teams can specify who checks outputs, who authorizes consequential actions, and who handles errors. Review should match the task’s risk: routine work may need light checks, while high-impact decisions call for stronger validation and an accountable human decision-maker.