What this means is that under the standard attorney rules of professional conduct, I am not allowed to reveal confidential information (e.g. your patents or other IP) without your consent. You can see the California Bar rules here, the American Bar Association rules here, and the USPTO rules here.
So in other words, I have a professional duty to keep your disclosures confidential. This duty continues until if and when you give permission to file your IP with the USPTO or other IP agencies, and afterwards (at least until publication) as well.