This guide examines enterprise AI agent security across five vendor categories: identity security (CyberArk), runtime platforms (Palo Alto AIRS), AI gateways (TrueFoundry, Portkey), MCP gateways (TrueFoundry), and red teaming tools. It argues TrueFoundry’s AI Gateway and MCP Gateway serve as the infrastructure control plane, handling 350+ RPS on 1 vCPU with roughly 3-4 ms latency while enforcing model access controls, budget caps, and audit trails.