SCP Foundation

This is a Safe SCP, that's fine. The problem is with the footnote:

SCP-XXXX will not be classified as Euclid, it doesn't matter how many feet it runs over.

This has no clinical tone. It's snarky, declarative and an attempt at humor. This should not be in an official, scientific document. I also don't see why running over people's toes would even result in people considering upping this to Euclid since object class relates to ease of containment, not danger level. I recommend cutting this out: it's inaccurate and silly, as far as tone goes. Remember, no matter how cutesy, horrifying, friendly and/or disgusting an SCP is, the Foundation's clinical tone does not change.

SCP-XXXX is to be contained within a five (5) meter by five (5) meter cell.

You can cut out the measurements entirely. They don't really contribute anything and the number(x) formatting you're using really only applies to hyper precise measurements, such as medicinal dosages. However, you don't even need to say that the cell has to be 5x5 meters since containment doesn't become more difficult if the cell is 6x5, 6x6 or 12x42 meters. You can simply state:

This one sentence is all you need for your Special Containment Procedures. That's because the rest is as follows:

Keeping SCP-XXXX in a cell is not necessary for containment, as it poses no threat if out of it's room or out of Site-██. However, only level-two personnel can access its chamber, due to repeated, unauthorized, use around the site.

The Foundation would not do this. This is a vehicle that can accurately determine specific details about classified areas as it drives past them and is a security risk. The Foundation would never allow this to just be used for leisure purposes. What if a janitor hears about what's in the room marked "SCP-106" as this drives by? What if an infiltrator hears? Remember, no matter how harmless an SCP appears or actually is, the Foundation will rarely allow its casual use/access. The Foundation has had trouble with seemingly safe SCPs turning into Keter class murder machines in the past, and yours is a clear security hazard. I recommend cutting this out or better describing the Foundation's attitude towards this thing.

SCP-XXXX is a standard, white golf cart. The approximate measurements are around one point two (1.2) meters wide, two point four (2.4) meters long, and one point eight (1.8) meters tall. The only abnormal part of SCP-XXXX's appearance is the coin slot in the middle of the steering wheel.

There's quite a few things off with this chunk. First of all, I'd recommend getting a nice picture of a white golf cart. Whether or not you do that, the first sentence is still problematic. First off, I think you can honestly just get away with saying that SCP-XXXX is a white golf cart since I certainly don't think most readers are going to get snagged on thinking 'but what kind of golf cart though.' If you want, you can mention if it's a two seater or a four seater but that's about as far as I would recommend going. Secondly, as described earlier, number(x) formatting and "approximate" can't coexist. Just stick to numbers and a picture will do this part's job. As for the coin-slot, I think this sentence can benefit from some tightening. I'd recommend something along the lines of: "With the exception of a coin slot in the middle of the steering wheel, SCP-XXXX is identical to a non-anomalous golf cart."

The anomalous properties of SCP-XXXX are activated once a quarter, or any money value equal to that, is inserted into the coin slot.

I take it you mean to say a quarter, 2 dimes and a nickel or 25 pennies can do the job. Just know that the way that this is phrased is a bit awkward as it means this will technically accept dollar bills of a country that's had it's currency properly inflated. I would simply rephrase this into something along the lines of: "SCP-XXXX are activated once coins or a coin surmounting to 0.25 USD are inserted into the slot."

Once the coin is inserted, SCP-XXXX will immediately 'power' on.

You already say the golf cart activates once 25 cents are pushed in so this is unnecessary.

In its powered state, SCP-XXXX will begin to speak. SCP-XXXX will instruct SCP-XXXX-A to 'climb aboard,' usually followed by the sound of a train whistle being emitted from SCP-XXXX's radio.

The first sentence can be tidied up into "SCP-XXXX is capable of speaking through its mounted radio once activated." The second sentences 'climb aboard' is a bit problematic. If this is exactly what SCP-XXXX says, then use full quotes: "climb aboard." If this is simply more or less what SCP-XXXX is saying, then this is a break in clinical tone and you should replace it with "sit down in SCP-XXXX." The train whistle part is fine but I think it could be better if you mention that the train whistle goes off before the cart starts moving, rather than as soon as the passenger sits down. I'll go over "SCP-XXXX-A" in the footnotes section.

Once SCP-XXXX-A sits in SCP-XXXX, SCP-XXXX will automatically begin to move.

Can be tidied into "SCP-XXXX will begin to move once it's passengers are seated."

SCP-XXXX will begin to give a tour of the building its in, despite having no previous knowledge of any of the buildings landscape or inhabitants.

This can be explored further. I would recommend going into how long the tour is(just one sector or does it try to go around the whole facility), how in depth is the actual tour is(how much of a security threat this cart is) and how fast it goes. I'm a little conflicted on the "despite having no previous knowledge" line as I personally feel it would sound much better as "despite never even being in any of the buildings it was tested in."

It is unknown why SCP-XXXX doesn't leave any shut-down messages, despite giving one for a greeting.

I don't think this is necessary. Given the tone and nature of your piece, it feels a little awkward to suddenly inject a mystery of 'why doesn't the cart say goodbye.' It's not a very interesting mystery either. I would recommend slicing it out or just remarking that it doesn't leave a shut-down message. Even if you follow the latter recommendation, some reader might view this as extraneous.

Requests to interview SCP-XXXX have all been denied.

The footnote says the cart doesn't talk back anyway. I don't see a reason why research personnel would explicitly forbid people from talking with it. If this is for security reasons then it makes no sense, since personnel are freely allowed to access it.

The interview isn't really good at all.

Researcher █████ was interviewed to see if he had any previous knowledge of SCP-XXXX before his purchase and to describe his experiences with it. If previous knowledge of SCP-XXXX was confirmed, a more thorough interview would be conducted and Researcher █████ would be terminated afterwards. (May or may not change, not exactly sure how the foundation would handle people being fired, amnestic or termination.)

I don't really understand this contrived reason why the Foundation is so fixated on whether or not this nameless researcher knew about the golf cart before buying it. I feel like they'd approach the seller instead. In regards to whether or not he's terminated, fired or brain flossed…none of them would happen. This researcher bought an item and it turned out to be an SCP. It's now easily contained and secured. The end. If it was a random civilian who bought this thing then maybe an amnestic is needed but that's that since the SCP is only a security risk when it tours a Foundation facility. This doesn't make sense.

Agent ██████: Hello, █████. I'm not entirely sure how much they told you, but I'm sure you know this is about SCP-XXXX, correct?

Researcher █████: Yeah, I know that much! Why the hell am I here? All I did was buy a golf cart, which just so happened to be another robotic SCP with a mind of its own!

I picked two lines but this is regarding the entire dialogue. Both characters feel a little more like robots than humans and no enriching information is conveyed. Furthermore, as I've already stated that the reason behind the interview didn't make sense, the dialogue consequently also doesn't make a lot of sense.

Then there's this:

Agent ██████: Thank you, that is all for now. The guards will be in shortly, hopefully you won't be terminated. I don't see any real threat with the cart, so it wouldn't be as bad as say, a Keter golf cart.

Agent ██████ visibly shivers.

It's pretty clear that this is supposed to be a joke line. I didn't find it funny, and I'm not sure if other readers would. Generally speaking, if you're trying to engineer a serious scene, don't toss in jokes.

All in all, I think this entire interview should go. It's wonky and it detracts from your article far more than it contributes. I would instead recommend adding in a test log to really show what it's like to be given a tour of a Foundation site, or one in attempting to converse with SCP-XXXX so reader know what this cart sounds like what based on word choice and whatnot.

The first footnote I already went through earlier so let's skip that.

The individual who inserted the coin will be referred to as SCP-XXXX-A.

Not really. SCP-XXXX-A generally means that the human is displaying some anomalous effects. Since you write -A as being just a human who puts in a coin and climbs on on their own free will, it's really a stretch to designate them as an SCP variation. I'd just stick to calling them 'the user' or whatnot.

This voice is said to be different for everyone who hears it. The voices are described as relaxing or soothing, this is believed to SCP-XXXX's way of ensuring its passengers enjoy its tour.

The voice can be recorded so you can just state outright that the voice differs between users. "this is believed to be SCP-XXXX's way of…" doesn't really have clinical tone. A researcher would use something like "hypothesize" and provide some reasoning, such as testimony from the users (User Bob remarked the cart sounded like his wife and user Jeb said it sounded like Bob Ross or whatever you choose).

I think footnote 4 is fine.

All attempts to converse with SCP-XXXX have failed, making it seem as if it is not sapient and only has 'programmed' responses.

The grammar can be tightened up here. If you added an (attempted) interview log, you could get rid of this footnote entirely. As it is right now it just feels…off. This is partially because of the grammar but there's also just something about it that feels off. I would recommend just stating that SCP-XXXX speaks as though supplied with pre-programmed voice lines, or by removing this entirely by adding in an actual log.