Containment Procedure 91-VITA (Standard containment for anomalous mid-urban structures) is followed for SCP-407-JP
I think it would read better as:
Containment Procedure 91-VITA (Standard containment for anomalous suburban structures) is to be followed for SCP-407-JP.
Security personnel are to guard the building that contains SCP-407-JP to keep civilians away from SCP-407-JP
Would change this to:
Security personnel are to be placed outside SCP-407-JP's location of origin to prevent unauthorized civilian access.
During the investigation by Foundation after being alerted about the disappearance of a civilian occult magazine-writer, SCP-407-JP was found at the place where is assumed to be the final destination of the writer in question.
Would change this too:
During the investigation by Foundation personnel after being alerted about the disappearance of a civilian, SCP-407-JP was discovered within the civilian's assumed house.
You don't need to say that the civilian was a writer.
Any attempts to remove SCP-407-JP have been unsuccessful
Instead of any, how about "all"
it can't be pulled out
To this:
it can't be removed
When seeing SCP-407-JP, subject perceives that it is filled with hot water, despite it is empty in actual fact.
To this:
While viewing SCP-407-JP, subjects perceive SCP-407-JP as being filled with hot water, despite it being empty.
At the same time, subject starts feeling the urge to get into SCP-407-JP.
To this:
During this, subjects start feeling compelled to enter SCP-407-JP.
Subject who sits in SCP-407-JP will feel as if he/she is dipping into the hot water to the shoulders, relaxing and getting in a dream-like trance as a result.
To this:
Subjects who enter SCP-407-JP will claim that they can feel the stated hot water, and will begin to experience hallucinations.
During this process, any interaction attempts by subject pass through SCP-407-JP's plug; this anomalous phenomenon doesn't arouse subject's suspicions at all. Subject never hope he/she will come out of SCP-407-JP. Subject still can be pulled out by external means in this stage. Once removed from the place where SCP-407-JP is visible, subject is freed from its effect.
To this:
During this process, any interaction from the subject to touch SCP-407-JP's plug will fail. The subject will not be alarmed by this. The subject will claim to never want to exit SCP-407-JP. Subjects can still be forcefully removed from external forces. Once SCP-407-JP is removed from the subject's line of sight, the effect will wear off.
If SCP-407-JP's plug is pulled out by external means while subject is still in SCP-407-JP, subject perceives SCP-407-JP's bottom gradually becomes deeper while its water level is kept constant. Furthermore, subject will express a significant sense of relief by soaking in SCP-407-JP. External person can observe that subject is "sinking" to the lower, passing through SCP-407-JP's bottom. All attempts to pull out subject in this process were failed, as well as the observation and trace of completely sunken subject.
To this:
If SCP-407-JP's plug is removed by external forces while the subject is still in SCP-407-JP, the subject will perceive the floor of SCP-407-J{'s gradually lower while keeping the water level constant. Personnel can observe that the subject is "sinking" through the floor, moving straight through the solid matter. All attempts to pull out the subject during this process have failed, as well as the observation of the completely disappeared subject.
Physical inspection and component analysis revealed that SCP-407-JP's plumbing trap is filled by human tears and saliva, which origin are unknown.
To this:
Inspection of SCP-407-JP's plumbing trap reveals large amounts of water, with the composition of tear fluid, and human saliva. The origins of these materials are currently unknown.