It's amusing to think that the endgame is that the humans in the loop are parents with credit cards.
I suppose you could never be sure that an agent would explicitly follow your instruction "Don't spend more than $5".
But maybe one could build a tool that provides payment credentials, and you get to move further up the chain. E.g., what if an MCP tool could spin up virtual credit cards with spending caps, and then the agent could create accounts and provide payment details that it received from the tool?
I suppose you could never be sure that an agent would explicitly follow your instruction "Don't spend more than $5".
But maybe one could build a tool that provides payment credentials, and you get to move further up the chain. E.g., what if an MCP tool could spin up virtual credit cards with spending caps, and then the agent could create accounts and provide payment details that it received from the tool?