Added to Cart Trigger

I have written some code that triggers the added to cart event in klaviyo whan a product is added to cart fron a non product page. 

My question is:

Do I need to send klaviyo all required product information, or does klaviyo fetch that data from the products that have already synced to klaviyo from shopify.

For example, if I only sent productID, does klaviyo ‘added to cart’ api populate the other event details such as categories, price, brand etc from the imported products in klaviyo

or do I need to send all the data across when the ‘add to cart’ button is clicked on the website?