Okay, gave you a quick read… major issue with this tends to be that you've got a lot of unnecessary "fluff text" that bogs down the article and makes it a chore for the reader to slog through. For example:
No other containment procedures required.
Analysis of SCP-2961 is inconclusive as SCP-2961 seems to be invulnerable.
In the first case, you don't need to say "this is the end". In the second case, the logic seems a little off (the conclusion of the analysis would probably be "it seems invulnerable"?) and you can likely just trim down the sentence to "As per lab analysis, SCP-2961 seems to be invulnerable" [to forms of x damage].
Containment seems kind of random—why 30 cm exactly? Why steel? Why glass? Can any substitutions be safely made? If so, there's no need to specify those exact measurements and materials. If you want to give some examples, state the current containment ("SCP-XXXX is currently contained in") or a range of things that will suffice (no greater than x size, metal box, etc.).
As for the item itself… it's kind of bland. It's just a pair of nailclippers that cause nail growth. (Does it work on cats? Iguanas?) The paragraph beginning with "SCP-2961 came into Foundation awareness" just reads kind of sloppily, since you've got at least one missing apostrophe and a bunch of casual language like "appeared in local news and could not stop his nails from growing". Furthermore, the correct term is "amnestics", you don't need to capitalize "item", and it sounds like a really bad idea to put an amnestic drug into a town's water supply.
Maybe you can make a tale out of this, but I personally don't really see it as much of an SCP article. If you really want to make it work, try getting the base idea polished up in the Ideas and Brainstorming forum before you try fixing the draft.