“Agents spawned via MCP tools (agent_spawn, mcp__claude-flow__agent_spawn) cannot communicate with each other using daa_communication.”
Quote · github.com
From “Bug: MCP-spawned agents not registered with Communication/MessageRouter”, found 2026-10-14.
A spawned agent isn't automatically one other agents can reach. Reported against v2; triage in October 2026 says the subsystem no longer exists in v3.