I came up with the idea of making a CS Essentials plugin, inspired by the one used in Minecraft. If you're not familiar with it, the plugin has a bunch of commands that use special permissions, for example "essentials.tphere" (this permission allows you to use the "/tphere" command). In order to achieve something similar, I register every permission as a cvar and add an admin flag to it - register_cvar("essentials.tphere", "d"). So, when the user doesn't have the required flag, I want to make a chat message that will say "Insufficent permissions ( essentials.tphere ). Isn't there a simple way of doing this?