Google and multiple vendors released the A2A protocol, standardising discovery, communication and task collaboration between agents. It does not replace MCP: MCP handles agent-to-tool, A2A handles agent-to-agent.
Key facts
- Defines discovery and communication between agents
- Complements rather than replaces MCP
- Launched jointly by several vendors
- Supports cross-organisational task collaboration
Big Share take
A flurry of protocols marks the shift from demos to engineering. However capable a single agent is, the real value lies in cooperation, and cooperation needs interfaces everyone accepts.
Compiled from public reports; opinions are for reference only.