> And don't hesitate to tell us if you have any questions!

I personally have no problem dealing with "ambiguity and open-endedness" (and, in fact, enjoy it!), but my solution to this problem at every job that has had this issue is: talk to people and understand the problem.

Attempting to "mind-read" is the worst solution to ambiguity, and, in practice, nearly always leads to disaster.

When the client can play with that, the scope can be expanded and additional features can be described.

What they want is someone they can work with. Take home tests are about cultural fit too.