Rev post a very interesting question, a question I'd been trying to come to grasp these days as well. Some photographers tend to play heavily on pre-visualisation, which is good in the sense that your image would almost certainly give you a sense of fulfilment, if you know that is the shot that you wanted. Then again, there's really no way to divorce the process of photography into pre-shooting, shooting and post-shooting nicely. Ideas keep changing along the way, and that in itself posits a question on when pre-visualisation actually stops and the visualisation process starts.
I have no idea why Rev post the question, for I am not Rev, and I definitely don't think that I know what he's thinking. Anyhow, I think the question for when the idea (the title, the intention) was formulated seems inconsequential IMO, for the idea is totally contradictory to the shot. It's obvious that you are looking from the outside inwards, since the building is place on the other side. In fact, when I first saw the title, I was like thinking, what is being confined? Apparently, nothing...
I guess the picture would work, if you were actually inside shooting out. In this case, your intention is simply the opposite to the picture, making the whole presentation a bad one.