Supply chain — cross-org agent negotiation

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.