Hey mate!
I figured this out today. I'm not sure how to customize them, but I know how to remove them.
ITEM DESCRIPTION in your inventory wheel, eg. "Slightly Restores Health Core"...
<description>CONSUMABLE_WHISKEY_DESC</description>
this whole line can be replaced with:
<description />
CATALOGUE BOOK Description in the shop catalog, eg. "Big Valley Apricots, the finest...."
<item>
<type>LABEL_TYPE_CATALOGUEDESC</type>
<values>
<item>CONSUMABLE_STRAWBERRIES_CAN_CATALOGUEDESC</item>
</values>
</item>
But im not sure if its as simple as remving it, I don't know how to edit it.