Trying to identify Spawn Eggs to a plugin.

I'm using PowerTool as a plugin. To make a global powertool, I go like this in the config:

ITEMID:
right-click: COMMAND NAME
run-as-console: true/false
permissions:
- PERMISSIONS GRANTED ON USE

Command names, easy. Got those. Permissions, got that.

But the items I want to put in are spawn eggs. And the spawn egg just has the one material name as I understand it... So how do I tell the plugin which kind of spawn egg I'm powertooling? Or can I?

(EDIT: And yes, I know that it's about damage values. But I'm not sure how to get the plugin to recognize that - is there a standard format for including those values, like MONSTER_EGG(50), I could use to indicate a creeper egg?)