I was pleasantly surprised at the actual page. The idea sounded a bit like you were trying to do the one thing you denied yourself: making it with the Foundation in mind. The SCP itself proved to me that you were right, it feels inspired and has a nice theme. The quote makes it very interesting.
I would say that maybe at places, it can be a bit more specific and coherent.
First of all, how does the Foundation know its an art piece if it were simply places in a park and presumed to be a bomb? It would, in my opinion, add to the mystery of the object if it is only speculated to be a piece of art. Even if this is an open door (as it did display quote that suggests this), the sheer absurdity of an artist being able to make such a device makes the idea that it is a piece of art implausible. You yourself may have a nice theory about who made it and how, but it helps if we're left guessing. (You could maybe add a paragraph at the bottom of the description with something in the vein of "It is speculated that …".)
Secondly, how the idea relates to the object isn't very clear to me (not as clear as it is in this topic). It might get a bit more clear what you're getting at when the actual containment procedures are added. As it is, however, it just feels like the object randomly changes conditions for containment in order to be a bitch to contain. If it didn't want to be contained, why does it state conditions of its containment and not just break out?
I would say this is answerable by, for example, having the containment procedures be something that makes the containing personal feels like the ones contained. This way, the piece of art has a definite goal in mind, namely to have the oppressed become the one calling the shots. It seems like maybe you were getting at this, as the personal only wearing polos seems like a scene out of a Chinese prison, so this 'problem' might resolve itself when you get to writing it. I guess all I'm saying is that with the current formant where it demands to be contained in a specific way, I wouldn't make those demands random but make them in line with the (very serious) theme of oppression.
That's about it. It's all there, I'd say: the theme, the intrigue and to an extent the mystery. Good job :)