Comment by motionlessveloc

"Foreign influence is defined as receiving support, whether monetary, organizational, or advisory, from foreign sources, which include foreign states, organizations, nationals, and any individual or entity under foreign influence."

However, there is a second pillar: the agent has to " engage in political activities, gather information on military capabilities, or create and disseminate information intended for a broad audience." Which is why eg Gazprom is presumably not a foreign agent.