Base class from which EditorToolAttribute and EditorToolContextAttribute inherit.
| defaultPriority | The default value for EditorToolAttribute.toolPriority and EditorToolAttribute.variantPriority. Specify a priority lower than this value display a tool before the default entries, or specify a higher value to display it after the default entries. |
| displayName | 在菜单中显示的名称。 |
| targetContext | If provided, the EditorTool will only be made available when the ToolManager.activeContextType is equal to targetContext. |
| targetType | Set to the type that this EditorTool or EditorToolContext can edit. Set to null if the tool is not specific to a Component and should be available at any time. |
| toolPriority | Tool priority defines the order that tools are displayed in within the Tools Overlay. |
| variantGroup | Tool variants are used to group logically similar tools into a single button in the Tools Overlay. |
| variantPriority | Variant priority defines the order that tools are displayed when shown in a EditorToolAttribute.variantGroup dropdown. |