As organizations transition to AI-native workflows, the 'Architect's Blueprint' must prioritize the isolation and verification of autonomous agents. This involves three core pillars: 1. **Sandboxed Execution**: Every agent should operate within a strictly controlled, ephemeral environment with no access to the host system unless explicitly required. 2. **Human-in-the-Loop (HITL) Verification**: For high-stakes operations, agents must submit their proposed plan for human approval before execution. 3. **Semantic Firewalls**: Implement AI-driven firewalls that analyze the *intent* of agent communications, blocking any requests that deviate from the agent's defined mission profile. These strategies move beyond traditional perimeter defense to create a resilient architecture capable of withstanding the unique threats of the Agentic Era.