SCP Foundation

http://scpsandbox2.wikidot.com/hayden-jayne

It's my first SCP, so any feedback I can get is great!

Moved to ideas/brainstorming.

Some of this confuses me.

When not visible

I presume this means when the corset strings aren't visible… or the corset? In the latter case, the effects are contradictory.

Backstory

So how could anyone have found this if it got buried? It's really implausible.

A corset that can move on its own and whatnot… okay, that's a bit intriguing, if done before. The whole "killing people" thing is tacky, and even with a backstory that sounds interesting (though backstories shouldn't typically make an article), the main effect seems like something that's been done a lot before. I'd advise working on this idea more and trying to figure out something more compelling for the corset to do.

Threat: When not visible, corset strings […]

Here's a concern I have. Perhaps this was just an stylistic choice of yours to separate the description from the effects, but it gives the impression that you think SCPs must be dangerous, which is not true. There's nothing wrong with wanting to go for the old archetype of "killing item", but the simple "this is spooky because you won't suspect it'll kill you untl it's too late" has been covered a lot and won't impress readers unless done really well. For example, take this (admittedly not too recent) skip about a watch that ends up with people covering themselves to death, which stands at a not too good but not too bad +67. Why? Because it paints a weird picture that grabs the reader's attention.

Backstory: Commissioned in 1854 by a noblewoman named Isabella Fitzpatrick, crafted by Angela Brehm. Stolen from Isabella by a woman named Marjorie Hamilton, who was found dead wearing it. Returned to Isabella, who was also strangled by it. Buried after Isabella's death. Found in 2013 by Johnathan Kennedy.

This is… alright. Not particularly gripping, but not terrible. However, you must think of the important bit: how did the Foundation learn this stuff happened? The wrong framing device can kill an otherwise good story if it breaks suspension of disbelief too much.