rcmds.mutercmds.exempt.mute/mute is a command that allows administrators to mute players.
Setting a nickname
/mute jkcclemens – This would toggle mute of the player jkcclemens.
/mute WizardCM 5m – This would mute the player WizardCM for 5 minutes.
/mute Mu5tank05 1h Please stop talking! – This would mute the player Mu5tank05 for 5 minutes with the reason Please stop talking!.