A person who tells secrets, often in a way that causes trouble

Someone who informs on others or reveals confidential information

सूचना देने वाला

English Usage: The tattler in the office always had the latest gossip about everyone.

Hindi Usage: कार्यालय में सूचना देने वाला हमेशा सभी के बारे में नवीनतम गपशप रखता था।