BIDS MEG validation - just directory structure and file types, or...?

Hi there,
I’m learning about BIDS and looking into implementing it for our data collection.
I primarily work with the MEG data, so I’m wondering about validation for MEG data. What does it actually check? Does it check anything about the actual MEG file, for example whether it has trigger data or if there are too many bad HPI coil measurements?

Apologies if I’ve posted in the wrong forum type.

Thanks very much,