The SketchUp Attribute Helper displays all the attributes attached to a component.
After installing the SketchUp Attribute Helper you can access the tool under the Plugins Menu -> Attribute Helper -> Visualize Selected. To use the extension, select a component who's attributes you wish to inspect then choose Visualize Selected. A dialog will appear which displays all the attributes for that component. There will be several sections for various groups of attributes. Attributes can be copied and pasted from the Attribute window.
This tool is an open source project hosted by they SketchUp team. For more information see: https://github.com/SketchUp/sketchup-attribute-helper.