The phrase "agent warned that the" is correct and usable in written English.
It can be used when referring to a warning issued by an agent, typically in a context involving caution or alertness regarding a situation or event.
Example: "The agent warned that the storm could cause significant disruptions to travel plans."
Alternatives: "the agent cautioned that the" or "the agent alerted that the".
Representative Porter Goss, a Florida Republican who was once a C.I.A. agent, warned that the inquiry could go on forever, and provide little conclusive evidence.
Foxtons, the south-east-focused estate agent, warned that the market was taking time to recover, especially in central London, where property transaction levels remain at historically low levels owing to strong recent price growth and stamp-duty changes.
The FBI – avid TechCrunch TV readers to a man – just made the plastic doll the subject of an official FBI memo, with agents warned that she might be implicated in sex crimes.
Estate agents warned that there would be a glut of properties for sale before June and none thereafter.
The real estate agent warned them that the house would be a "teardown".
Other agents warn that Brexit may leave the property market moribund for months.
Sale, the subject of trade rumors nearly every year, said his agent warned him over the last couple of weeks that the move might be coming.
At the White Plains Ritz-Carlton, Raj, the undercover F.B.I. agent, warned him that this would require bribing his fellow Democratic senators.
The racketeering indictment is what prompted Mr. Bulger, a crime boss and an F.B.I. informer, to flee in January 1995 after a retired F.B.I. agent warned him that he was about to be arrested in the case.
Soon after "Stop-Loss" came out, her agent warned her that it was only going to get harder to make the kind of movies she liked.
Harold Rogers, the Republican chairman of the House Appropriations Committee, warned that the full cut would require laying off F.B.I. agents and air traffic controllers.
