Legal Question in Wills and Trusts in California

No. The successor trustee has only the powers as provided in the trust agreement, unless the still living settlor/original authorizes disclosure; advise you get subsequent disclosure in authority in writing from the settlor of the revocable trust before you disclose anything to beneficiaries..

A trustee has no duty of disclosure to the contingent beneficiaries of a revocable trust until that trust becomes irrevocable after the settlor's death. It would be unusual for me to advise a trustee to make any disclosure to the contingent beneficiaries without the settlor's consent.