What changed
The preview adds a searchable registry with approval workflows, IAM and OAuth access, URL-based discovery, and MCP access from IDEs and agent systems.
Why it matters
Governed discovery is becoming a control-plane feature as enterprises accumulate more agents, tools, and MCP endpoints.
Evidence
AWS says Agent Registry is a private governed catalog in preview and that it can be accessed through the console, APIs, or as an MCP server. The docs position it as a centralized discovery service with approval workflows and search.