The presumption is that he is demanding a) identities and info about spies and assets so they can be exposed and sold out to foreign powers to profit Trump, and/or b) he is demanding false information that supports Trump's lies and conspiracy theories to justify Trump's further law breaking and civil rights violations especially related to rigging/stealing the midterms.

yes indeed

Look at all the generals Hegseth has already removed.

And any witnesses

Installing clueless sycophants in their place.

on the grounds that there is a strict list of requirements for the job that he does not meet.

is complete and irreversible.