What you really want is fiduciary duty - A fiduciary is a person or organization that is legally and ethically bound to act in the best interest of another party (think financial advisor, attorney, guardian, trustees, etc...)
And I cannot agree more. I think we should be shooting to enshrine required fiduciary duty into law for LLM providers as quickly as possible.
To recap why:
Legally, fiduciary duty means basically 4 major tenets must hold
1. Duty of loyalty - it must put the interests of the client ahead of their own
2. Duty of care - it must make well-informed, prudent decisions
3. Avoidance of conflicts - it must avoid situations where personal gain conflicts with client obligations
4. Transparency - it must disclose fees, risks, and conflicts as soon as possible
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You can't have a reliable "agent" if those things aren't true, because an agent is (by definition) someone who is working on your behalf, for your goals. If it's not working on your behalf, for your goals... it's not your agent, it's an opportunistic spy (double agent) waiting for the best moment to sell you out.