description

The description the model sees for a derived schema: on a case class parameter it describes the field, on a case class, enum or sealed trait it describes the type.

The text must be a string literal (@description("Total amount")), because the annotation is read at compile time and a macro cannot evaluate an expression. Without it, a field is described by its name and a type by its name.

@description("An invoice extracted from text")
case class Invoice(
 @description("Name of the vendor or supplier") vendor: String,
 amount: Double
) derives SchemaOf