Peter,
IMHO, the practioner has a responsibility to act professionally, which (to my mind) means to draw attention to any perceived problems. Stating "tax-disqualified" is a conclusion that may not yet be warranted. Yes, it's possible, but there may be facts not yet in evidence. [As an Enrolled Actuary, even if all the facts are known, I would try to avoid stating "disqualified" in all cases, believing that is the prerogative of the attorney and/or the CPA.]
If the practioner has any ERISA "qualifications" (Enrolled Actuary, atty, CPA, Enrolled Agent, ERPA), then I suggest replacing "responsibility" with "duty". If the practioner has any actuarial credentials, the actuary must also ensure compliance with Actuarial Standards of Practice (ASOPs) as well as the Actuarial Code of Conduct.