@type status() :: :in_progress | :completed

@type t() :: %Codex.Realtime.Items.RealtimeToolCallItem{
  arguments: String.t(),
  call_id: String.t() | nil,
  item_id: String.t(),
  name: String.t(),
  output: String.t() | nil,
  previous_item_id: String.t() | nil,
  status: status(),
  type: :function_call
}