tell tales out of school

Snoop Dogg, Cardi B, et al., tell tales out of school in the new series “Untold Stories of Hip Hop.”

Horace uses his insider status, and no doubt interrogation skills he learned on the job, to get a number of police officers to tell tales out of school, including out of the police academy.

"One can't tell tales out of school," he said.

What! should I tell tales out of school?

If so, will have to say that I never tell tales out of school.