In the Web Console:
server.description "this is my server \n test123" (\n works as enter)
server.writecfg (saves config)
server.readcfg (updates everything to saved config)
Restart Rust/refresh and you should be good to go
You might keep what you want to enter in console in a text file so you can copy / paste as Rust is known to eat this setting.
Looking for a game server host known for brilliant 24/7 customer support and quality hardware?
Try a Pingperfect Rust server today! https://pingperfect.com/gameservers/rust-experimental-game-server-hosting-rental.php