Howdy!
So first of all, there's a lot of fun in redactions and black boxes. They seem like a neat trick sometimes to invoke "
nothing is scarier". But the truth of the matter is, in a lot of cases, they get in the way of your storytelling. What you want to do is try to avoid
not telling your story. A lot of the series 1 SCP objects over use that censorship in a way that has come to define what people think of when they think of the SCP foundation. Beyond that, a lot of the most popular SCP objects are simply object descriptions of terrifying things.
What we strive for in a modern SCP though, is an object that tells a unique story, or tells a story incredibly well. I can count the number of successful series 3 skips that are "just an object" on my hands (there may be more than that, mind you, but that's how many I can think of). Even then some of them have the skeleton of a story.
SCP: Containment Breach utilizes a lot of series 1 and a couple of series 2 skips to amazing effect. That said, the types of SCP objects in Containment Breach are no longer the focus of the site itself. If this is simply meant as an exercise in writing something
like a series 1 piece, well done. It's got that vibe. If you're interested in writing for the site though, this wouldn't do very well.
You have mostly nailed the clinical tone. There are a few problems here and there, but you clearly know what you're supposed to do with the tone of the piece. What you have could be legitimately terrifying as well, and I feel the barest hint of a story here (that of the Doctor who pities the D-Class being subjected to this, but still feels the testing must continue for "reasons"). I believe if you develop what's behind the censorship, and try to focus in on why they're testing this so much (at some point they should have all the data they need, unless you explain a reason why that's not true), you can bring that story to the fore.
Finally, and probably most notably, this is not a Euclid class object. If you lock this in a room and leave it there, it harms no one. The object class is mostly a determination of the ability of the object to escape or continue to produce anomalous effects while in containment. Not the danger of the object to the D-class we test it on. It fails the locked box test for Euclid and Keter objects. Ask yourself "If I lock this in a room and never touch it again, what happens?" If the answer is "nothing" then it's Safe.
To yonzo_rikuo: You can find everything you need on this page:
http://www.scp-wiki.net/contributeIf you have the time or inclination you can check out stuff I've authored for the SCP Wiki here:
http://www.scp-wiki.net/dr-cimmerian-s-personnel-file
Also hello from the SCP Wiki!
I am a member of the actual wiki, but I haven't posted it to the main site yet because I want it to be perfect first, to avoid getting downvotes. Would like constructive criticism.
or 
would fit in better than the alternative, I'd use it. So far I haven't needed to stick one in. That said, I know of one or two articles that use them to chilling effect.