A Trait representation represents a Tinkers' Construct Trait.
You can get such an object either from the Trait Builder or from the Trait Bracket Handler.

It might be required for you to import the class if you encounter any issues (like casting an Array), so better be safe than sorry and add the import.
import mods.contenttweaker.tconstruct.Trait

ZenGetter	Тип
ZenGetter identifier	Тип string
ZenGetter commandString	Тип string

If you combine the given ingredient together with a tool in a tinker's tool forge, you can apply the trait as modifier.

ZenScript
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//myTrait.addModifierItem(IIngredient item, @Optional(1) int amountNeeded, @Optional(1) int amountMatched));
myTrait.addModifierItem(<item:minecraft:iron_pickaxe>);
myTrait.addModifierItem(<item:minecraft:iron_block>, 4, 2);

• item is the item that is matched against. You can use Item Conditions but no Transformers.
• amountNeeded is the amount of items that is matched against. You can split them over all the slots the toolforge provides, which also allows you to go above 64. In the example above, you need 4 iron blocks per addition. Defaults to 1.
• amountMatched is the amount of trait points added per amountNeeded. In the example above four iron blocks give two trait points. Defaults to 1.

Trait data is the data that belongs to a trait and is itemBound. As such, you can provide the IItemStack and retrieve the TraitDataRepresentation object.

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val myTraitData = myTrait.getData(itemWithTrait);