As further detailed in the containment essay I linked you:
The containment chamber for SCP-XXXX consists of a 5*5*5 meter metal room constructed around the object itself.
The measurements of this chamber do not seem to have anything to do with the specific anomalous properties of this object. There's no justification for any particular size, nor of the immense height of the chamber.
This room can be accessed by a small windowless door on the south wall.
Again, why is this relevant? If the door were moved to the north wall, would it pose a breach risk?
A minimum of 3 armed guards are to man the site at all times, allowing no civilians within 100 meters of SCP-XXXX.
How the on-site security personnel handle trespassers is entirely relevant to special containment, but the number of guards is irrelevant and around-the-clock containment and guard is normal.