Description

This class represents the creation tools group. Pass this class’s type to the ToolAttribute.group parameter to place your EditorTool button in the built-in creation tools group in the Tools overlay.

Only tools that create new objects and/or data in the Scene View should be registered to this group.

using UnityEditor.EditorTools;

// Register Editor Tool as a creation tool
[EditorTool("Custom Creation Tool", group = typeof(CreationToolsGroup))]
public class CustomCreationTool : EditorTool { }