Detect Hidden determines how well you can find hidden figures in the shadows. It allows you to reveal hidden players (group members are excluded from being revealed).
When invoking the skill, the player is presented with a targeting reticule which they can use to reveal any hidden individuals within an area. If the attempt is successful, any hidden players within the area will be revealed.
Detect Hidden reveals targets hidden through the use of Invisibility, Hiding, and Stealth. Any individual using Hiding and Stealth may re-hide upon detection.
It also has an action called Disarm Trap associated with it, which offers a chance to disarm trapped chests.
Detect Hidden grants a small chance to passively reveal hidden mobiles while the detective is moving.
Each hidden player in the vicinity has a separate chance to remain hidden. If the detective is successful in finding one person, it is possible that someone else nearby will remain hidden.
To disarm a trap, the player must have at least 80.1 Lockpicking and Detect Hidden. Disarm Trap provides a chance to disable traps on chests that are not locked (e.g. have been lockpicked). The success chance is based on both Lockpicking and Detect Hidden skills.
While 80.1 will allow you to disarm chests up to level 4 (Cleverly), to disable traps on level 5 (Devious) chests, you must have 94.1 in both skills.
To use, grab the skill from your skillbook, activate it, and target a trapped, unlocked chest.