"Count" (Inventory count)
"Tradelist Count"
"Name"
"Edition"
"Condition" (Mint, Near Mint, Good (Lightly Played), Played, Heavily Played, Damaged)
"Language"
"Foil" (foil or blank)
"Signed"
"Artist Proof"
"Misprint"
"Promo"
"Textless"
"My Price" (for seller accounts)
Specifically in that order, though not all are needed, without the quotes. Foil through Textless are just extra tags. My Price is only used for seller accounts. If you don't specify Condition or Language it will just be left blank.
Some cards will have issues, such as
Lim-Dul's Vault and other cards with special characters.
You could try adding some cards with varying characteristics and then doing an export just to see what it looks like.