Crediting the sound engineer for a specific instrument

I have two releases that have the credit “Drums Engineered by Atsuro Takada” on their booklets. How can I credit him for this?

The first one I did looks completely wrong, but has the information on it (instrument programming [drum] tag with credited as “Drums Engineered by”):

The second one I used is just the sound engineer tag but this makes it look like he did all sound engineering instead of just for drums (on all tracks except the last of the DVD, which isn’t a song):


The best way, for now, would be to credit him as “engineer” and point out in the annotation any further details (e.g. instrument).
Someone proposed a ticket a few years ago that would add instrument and vocal attributes to the “producer” and “engineer” relationships (like the “programming” relationship currently has).