Vigilant Guard

Trigger A creature within the monster's reach uses a manipulate action or a move action, makes a ranged attack, or leaves a square during a move action it's using. Effect The monster attempts a melee Strike against the triggering creature. If the attack is a critical hit and the trigger was a manipulate action, the monster disrupts that action. This Strike doesn't count toward the monster's multiple attack penalty, and its multiple attack penalty doesn't apply to this Strike.

The guard makes a Strike with a melee weapon, extending their reach by 5 feet for that Strike. If the weapon has the disarm, shove, or trip trait, the guard can use the corresponding action instead of a Strike.