Write for players, not for the editor
A useful MOTD quickly answers three questions: what kind of server this is, what makes it different, and whether there is something players need to know now. Lead with the strongest detail and remove filler that does not help someone decide whether to join.
HyTools keeps the native MOTD as plain text because unsupported color codes can become visible noise. The preview is for readability only; the final rendering must be checked in the current Hytale client.