AI agents become useful when they can do more than generate text. The moment an agent can update a CRM, approve a refund, create a purchase order, change a price, or send a customer response, the architecture must answer a harder question: Which actions should the agent execute automatically, and which should require human approval?That decision sits at the center of production-ready enterprise AI agent architecture. Too little oversight creates operational and compliance risk. Too much oversight turns the system into another approval queue.