Okay, right off the bat, you need a rating module, no period after the object class, and to bold the containment and description headers. Basic SCP article template can be found in the "Templates" tab of the How to Write an SCP Guide—use it! If a reviewer's first impression of your article is "doesn't have basic formatting", that's not going to do you as an author any favors. If you can't be bothered to get something as simple as formatting down, why should the reviewer put time and effort into a critique of stuff that you could fix easily on your own, that sort of thing.
- You shouldn't have nicknames in the article. It doesn't matter what the SCP object wants to be called unless it impacts containment; personnel will refer to it by its numerical designation.
- Why all those specific meter measurements in containment? What if the desk is part of a meter off? If nothing terrible will happen, there's no need to require those exact specifics.
- Don't use unnecessary words like "strange" to describe appearances. Just stick to stating what the thing looks like/what sort of appendages it has using objective adjectives, and sparingly.
- Phrasing's a little weird. "not provided with material where pencil lead is eligible to continue writing" Technically, the graphite lead from inside the pencil could be provided, but writing with those little pieces alone is near impossible.
- Doctor ██████ seems really unprofessional and kind of like they have no clue what they're doing. They seem to lose their composure ridiculously quickly, and then they lose control of the interview entirely. It just makes the Foundation look bad at that point.
- Capitalize "Foundation" when using it as a proper noun.
- Use question marks when a character is asking a question.
I dunno. It seems like the usual "humanoid that knows stuff and is smarter than the Foundation and also knows about other SCPs because reasons!" build that we see at least once every few weeks here. I like the idea of the SCP writing conversations through equations, but that seems to be the only part in the draft that I haven't seen at least a dozen times before in previous works.
Maybe read over this guide on common mistakes in drafts to get an idea of what elements to avoid putting in an SCP article. Humanoids are actually one of the most difficult articles to write successfully; if you're really set on writing one, then take a look at the humanoid writing guide before approaching this draft again.
Also, consider hashing out the base idea in the Ideas and Brainstorming forum before drafting next time. If you have a solid concept from the very start, there's less of a chance you'll waste time in the drafting phase.