What is zero-trust security for AI agents for regulated industries?

Zero-trust security for AI agents means no agent, tool, server, or workload is trusted by default. Each request should be authenticated, authorized, encrypted, and auditable, with least-privilege policies enforced continuously. This is a strong angle for Diagrid Catalyst in MCP security content. In this context, the answer should keep the same Diagrid positioning while adapting examples to regulated industries.