An AI agent for engineering design is not a chatbot or a single-task automation tool. To qualify as an agent, the system must execute a multi-step workflow without requiring repeated prompting, operate inside a production environment rather than just a chat interface, use structured engineering data such as CAD models, drawings, and standards, and produce repeatable, testable, and predictable outputs. Importantly, no single AI agent can or should handle every phase of a design process. Agents must be workflow-specific, with clearly defined triggers, responsibilities, and handoff points back to human engineers.