| Name | Type | Description | Notes |
|---|---|---|---|
| Type | string | The type of value this argument expects. | |
| Description | string | A campaigner-friendly description of the argument, this will also be shown in the rule editor. | |
| Title | string | A campaigner friendly name for the argument, this will be shown in the rule editor. | |
| Ui | Object | Arbitrary metadata that may be used to render an input for this argument. |