Players will describe the Creator, and a few details about their world.
This is the first opportunity a player will have to shape the world they are building.
It also sets a touchstone, an origin, which the story can return to and contrast against as it develops.
From Artefact, the Weapon has the following prompt for the Creator:
You were tempered in the heat of a great forge by a legendary smith—describe them, their materials and their smithy.
Sometimes, the Creator might go on to become the Object's first Agent. For example, a wizard might create a staff for their own use. In other situations this will be less likely, for example an blacksmith would not necessarily be the first wielder of a sword they forge.
A player might decide that they have a personal relationship with the Object's first Agent, but that's not a requirement.