Silicon Valley is bullish on AI agents. OpenAI CEO Sam Altman said agents will “join the workforce” this year. Microsoft CEO Satya Nadella predicted that agents will replace certain knowledge work. Salesforce CEO Marc Benioff said that Salesforce’s goal is to be “the number one provider of digital labor in the world” via the company’s various “agentic” services. But no one can seem to agree on what an AI agent is, exactly. In the last few years, the tech industry has boldly proclaimed that AI “a...