Constraints a good thing. Agreed. Only, we hadn't received much of a brief in advance of the shoot ourselves. You've seen Antony - what would you project over him to make a good photograph in your opinion? You're the photographer!
Here's a helping hand, though: we learned this morning that Antony feels his aesthetic is very much about 'gardens and horses' at the moment. How literally you want to take that is up to you. I'll be looking out for yours in particular, F:lux. There's no link to your portfolio on your profile and I'm curious!