The golden door is the middle tier of doors. Players can toggle a door to be opened or closed by hitting it. Only the person that placed the door and teammates can use it. Golden doors have much more health than wooden doors and stone doors.
Having multiple doors in a base can help as they enable players to enter and exit the base with convenience, and reduces the chance of being locked out if a player blocked the doors.
Any amethyst tool or hammer can break the golden door if used long enough. Normal tools are not able to break the golden door.