You have to be an admin on your server. How to be an admin on your server
If you are an admin, login and connect to your server.
Press F1 to open in-game console and type server.tags "builds,creative,training"
List of Available Rust Tags
On the in-game console, type again server.writecfg to save.
All done! You just added tags on your server!
Updated on: 30 / 08 / 2021