Short answer: in n8n, you don't give the AI Agent node a spending limit in its prompt. You attach an MCP Client Tool node pointed at a payments server that enforces the limit itself, so the workflow's "pay this invoice" step always resolves to one of three states it didn't decide on its own: allowed, waiting on a person, or blocked. Pink Agentic AI Payments checks each payment an agent requests against per-agent budgets and rules before it executes, and routes the rest to a human. That is wha...