Meta's Muse is a personal AI agent capable of autonomous action—booking travel, sending emails, negotiating deals, and processing payments—while operating in an isolated security environment (Muse Secure VM) with a guardian agent (Sentinel) that intercepts all external commands. The architecture addresses the core trust problem of agent-based systems by keeping passwords hidden from the model, using temporary tokens, and requiring human approval at sensitive points. While prompt injection remains an acknowledged unsolved problem, Meta's multi-layered defense approach aims to minimize damage and offers up to $300K bug bounties. This represents a significant step toward practical AI agents for Thai SMEs seeking automation of routine business tasks.