The text for the tool description
Optional displayThe string ID for the tool description if it is in the localization language file.
The icon for the tool rail button. This is generally a URL
to an image file in the editor extension resource pack e.g.
pack://textures/my-tool-icon.png
Optional onOptional onOptional onOptional onThe tooltip string for the tool rail button. Note: if an
activation key binding was added to ISimpleToolOptions,
then the key binding will be appended to the tooltip string.
Optional tooltipThe string ID for the tooltip string if it is in the
localization language file. Note: if an activation key
binding was added to ISimpleToolOptions, then the key
binding will be appended to the tooltip string.
The tool rail component allows the tool to register an icon and button (and dynamic tooltip) in the tool rail on the left side of the display. Adding a tool rail component to a tool will cause the tool to be considered a
modal tool, and only one single modal tool can be active at any one time. Modal tools are generally tools which take focus and control of the cursor (e.g. selection, clipboards, entity selection, etc) Global tools (tools which do not have a tool rail) are generally things like property pages, settings, etc - things that do not require an active cursor or gameplay interaction