So, I installed the discord plugin for rust server. It works wonderfully.
The / players is well functional.
  However, it is possible to put custom commands in the discord with respect to the Bot.
I give an example:
- I want that when the players type in the discord: "/ wipe", well the bot gives you the date of the next wipe.
Basically, add custom commands with the Bot on discord.

Please post in the section for the plugin you are using that provides the commands referenced.