They really should have the CLIENTS best interest at heart . Nothing should be said without permission. Realtors are held to a code of ethics. Regular plain real estate agents are not. Big difference. When a consumer is a CLIENT - all info is to be held confidential. When you are a plain customer who does not sign and understand agency , then you are not a client and may be treated differently.
In the future , please request a confidentiality contract be signed . Protect your rights and privacy. As a buyer submitting an offer, you can make it so that the seller agent and seller can not share your offered price, terms, dates etc with anyone else. Real important , especially in little towns where everyone knows everyone or where people tend to have a big mouth.
If they are a facilitator, then almost anything goes.
If it is the seller you are talking about then there is no confidentiality.
In the case of the seller or facilitator, while not illegal, I find it unethical.
Buyer's as a side note: Please, please, take the time to understand agency relationships. More buyers are less than satisfied because they do not understand the relationship they have with their agent.
As a matter of fact, there are a lot of people out there gathering information about every sale to use in their statistics books. Don't be surprised if someone approaches you.
A lot has changed in my lifetime, (I'm an O.F.), when I was young, people talked: Didn't worry about it. Nowadays; people are afraid to say the wrong thing or talk to the wrong person. Too much paranoia out then; rightly so.
Good luck and may God bless