Yeah that's pretty much it, though there are some caveats in the RP, as you'll see now.
( Iaidō ) - Art of Quick Draw and re-sheathing the sword
Rank: A - Forbidden
Type: Offensive / Defensive
Range: Short
Chakra: 30 - 50
Damage: 60 - 90
Description: Iaidō is a form of kenjutsu where the user utilizes his chakra to quickly draw the blade extremely fast to strike before re-sheathing it. This method prevents enemies from using hand seals, thus preventing them from using Ninjutsu, making it highly effective against ninja. At A rank, this technique is capable of preventing more than 2 Hand Seals from being chained together. S rank prevents from than one seal from being completed while Forbidden ranked usage is capable of preventing even one handseal but can only be used twice a battle.
Note: Can only be used by Samurai biographies.
Note: A rank can only be used three times while S rank can only be used twice.
You'll notice it has a limited number of usages and short range only, meaning you need to already be close to make good use of this ability. As you are not a samurai and are only gaining access to this through a speciality you are only capable of using Iaido of A rank, do you have any questions?