Supply chain, cross org agent negotiation
A buyer's agent negotiating with suppliers' agents, A2A is the axis.
Open the live lab · preloaded to this scenario
Protocol Selection Decision Model
Context
A buyer's agent negotiates with suppliers' agents across organizational boundaries. There's no central governance and few shared tools, the work is agent to agent coordination, so A2A is the axis.
The decision
A2A: the work is horizontal coordination between independent agents across orgs, not tool access under one roof, exactly what A2A is for.
What most miss
People default to MCP because it's the tool integration story. Cross org negotiation has no central tool surface; the protocol you need is the agent coordination one.
Stakes
Forcing an MCP/tool frame on a cross org negotiation misses that there's no central authority to host the tools.
Studied · Agent Architecture and Protocol Strategy Artifacts · verified 2026-07-03
Sources: Cross-org agent coordination / negotiation (A2A); Supply-chain multi-party agent patterns