AI Reports · Amazon · 2026-10-20 · Blog / commentary
Discover tools at runtime with AWS Agent Registry
Hardcoded tool wiring breaks down as an agent's catalog grows from a handful of tools to hundreds, with each new capability requiring a code change and redeploy. This post walks through a runtime Discover, Instantiate, Execute loop built on AWS Agent Registry, where an orchestrator discovers MCP servers and A2A agents through semantic search instead of compiling every tool at build time. AWS Agent Registry is a managed service for cataloging and discovering MCP servers, agents, and agent skills, and its search results do not return the capability's invocation credentials or authentication scheme.