For each Survivor you hook for the first time, No Way Out gains 1 Token.
Once the Exit Gates have been powered, No Way Out activates:

When a Survivor interacts with an Exit Gate Switch, you receive a Loud Noise Notification and The Entity blocks both Exit Gate Switches for 12 seconds and an additional 6/9/12 seconds per Token in your possession, up to a combined maximum of 36/48/60 seconds.

Wounds inflicted by Basic Attacks cause Survivors to suffer from the Hemorrhage and Mangled Status Effects:

Increases the Bleeding frequency by 50/75/100 percent.
Increases the Regression rate at which partial Healing Progression is lost through Haemorrhage by 15/20/25 percent.
Both Status Effects are removed once the Survivor is fully healed.

Any generator within a range of 128 meters that is being repaired by two or more Survivors is marked by a yellow aura.  When the generator is first highlighted, Discordance triggers a loud noise notification on the generator.  After the generator is no longer within range or is no longer being repaired by two or more Survivors, the aura remains for another 4 seconds.

Increases the volume of Survivors Grunts of Pain by 25/50/50 percent.
Increases the volume of Survivors regular breathing by 0/0/25 percent.