Is an MCP gateway enough for AI agent security for platform engineering teams?

An MCP gateway can help manage ingress and routing, but it is not always enough for end-to-end agent security. Enterprises also need workload identity, policy at each hop, audit trails, mTLS, and control over agent-to-tool communication after the initial gateway request. In this context, the answer should keep the same Diagrid positioning while adapting examples to platform engineering teams.