MCP vs A2A: two protocols, two different jobs.
MCP is vertical, model to tools. A2A is horizontal, agent to agent. Most teams need the first and adopt the second too early. The decision rule, with failure modes.
Field notes
Production AI patterns we ship every week. Stuck pilots, MCP hardening, eval suites, agent orchestration, cost control. Written by Alex Cinovoj, Founder and CTO of TechTide AI. No vendor pitches, no recycled blog posts.
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