Use 'circuitous' when simplicity isn't the goal and complexity is expected or required in the explanation or route. His instructions were unnecessarily circuitous for such a simple task.
Pro Tip 2/3
Extended Conversations
'Circuitous' is often used when someone takes a long time to get to the point in a conversation. During the debate, her circuitous answers frustrated the audience.
Pro Tip 3/3
Not Always Negative
Sometimes 'circuitous' can describe a positive and strategic approach rather than a purely inefficient one. The lawyer took a circuitous approach to reveal the unexpected evidence.