People guide key decisions.
Use this approach when a person should review a plan, decide on a consequential action, or approve a result before it moves on. Agents can prepare work; responsibility for the decision stays with the designated person. Technically, this is the human-in-the-loop operating model.
Agents work within defined limits.
Use this approach for work that can proceed under boundaries established in advance: the allowed scope, resources, and actions are set before the work begins. Technically, this is the no-human-in-the-loop operating model.
Combine the approaches.
Many workflows need both: agents carry out defined steps while people guide decisions, review exceptions, or approve a hand-off. Set the division of responsibility around the work — not around the tool.
Make exceptions explicit.
Decide what happens when the workflow reaches something outside its agreed scope: stop, hand off to a person, or follow another approved path. The exception plan is part of the workflow design.