[TW5] ToolTip for SideBar Links generated through a $List?

[Zaphod Beeblebrox]

Just wondering if there is a way to add a tooltip to the links in the SideBar that are generated from a toc list?

I currently have this "Movies" tab in the sidebar:

<div class="tc-table-of-contents">
<<toc-selective-expandable 'Movie' sort[title]>>
</div>

I'd like to have a tooltip pop up on hover that would give a brief description, like "NTSC DVD9" or "DVD-Rip (DivX)" or "VHS-Rip (AVI)" etc.

I'm assuming a field in the linked-to tiddler could be designated for this purpose.

Thanks in advance for any ideas :)

--Zaphod