I think the proposition only works if you consistently order the same items from the same restaurant (and so on). It makes the order more predictable ("hey siri, order the same takeout I got from X chinese spot last week").

I don't need to see a menu, prices, or options for that unless I want to deviate from it.

Then you don't need an agent. You just need a classic automation.

Sure, if the audience is all developers. We're talking about people who very likely are not.

The food delivery app I use occasionally has a reorder button for past orders. I've never used it but I can't imagine it's more of a hassle than typing something to a hallucinating chatbot

I suppose there is levels to all of these things. For somebody who uses apps to obtain most of their food, this is probably the next step.

Ordering off of DoorDash (or whatever equivalent app elsewhere) in general seems to be the worst possible way to acquire and eat food, in my personal opinion.

Everything on these apps is nutrition-zero junk, filled with salt, oil and sugar, charged at a premium. I ate it in the past, and nowadays I couldn't be paid to eat it. Self-cooked meals beat them in every way, including convenience.

I order all of my groceries using Muse. It's great at finding all the food items I like. But yeah, I wouldn't use it for Doordash, although I order takeaways anyway.