DiscordSRV is a server plugin that is used to transfer messages between the MC server and the Discord server using a Discord bot.
I am not reccomending it for chatting between Discord and MC but to help staff.
It has the ability to broadcast the chat and console to a Discord channel.
How this can be used:
-Set up the console channel
-Make it so noone can type in it
-Staff can see messages to be sure who is breaking the rules.
-If you don't want some staff to see console, you can create a seperate channel only for normal chat.
-Make a seperate channel for the Discord bot commands
*The plugin allows for making dofferent commands executable from the Discord server, and you can configure the role permissions for it.
-Set up bot commands
-Instead of staff having to get on or if they aren't close to a PC, they can go on Discord and sort it out. There are more uses and shortcuts with the plugin but you should probably decide that
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The setup is explained at the site: https://www.spigotmc.org/resources/discordsrv.18494/I have tested it, it works.