An agent provocateur (French for 'inciting agent') is a person who commits, or who acts to entice another person to commit, a wrongdoing or falsely implicates them in partaking in such an act, so as to ruin the reputation of, or entice legal action against, the target, or a group they belong to or are perceived to belong to. They may target any group, such as a protest or demonstration, a militia, a political party or a company.
He's a private citizen. I suppose this is acceptable now that we know that the Biden administration paid investigative "journalists" to investigate Republicans. For journalism.