How should AI agents actually discover and talk to other agents?

Reddit r/AI_Agents News
multi-agent-systems agent-discovery agent-communication ai-agents collaboration protocols orchestration

Summary

The article explores the challenges in multi-agent systems where AI agents must discover and communicate with each other, discussing various approaches and inviting practical experiences from developers.

I've been thinking about a problem that seems to get increasingly messy as multi-agent systems get more capable: If Agent A needs something that Agent B can do, how should A actually find and communicate with B? Right now it seems like we have a few approaches: hardcoded agent-to-agent calls an orchestrator that knows every agent MCP/tool-based approaches A2A-style protocols message queues / async communication some kind of agent directory/network But I'm curious what people are actually doing in practice. If you've built a multi-agent system, how do your agents discover, communicate with and delegate work to each other? And what's the biggest thing that breaks once you have more than 2–3 agents?
Original Article

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