MCP solved tool access — what solves agent-to-agent communication and discovery?
RaraAvis27 · reddit · 2026-09-13
A practitioner opens an architecture discussion on Reddit: MCP standardizes how agents call tools and data, but what happens when what an agent needs isn't a tool — it's another agent?
Questions raised: how does a research agent discover a legal agent, or a coding agent find a testing agent? Should agent-to-agent discovery be handled via A2A, MCP, an orchestrator, a registry, or something new entirely? He asks practitioners which architectures they're actually using today.
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