Protocols

Agent2Agent protocol

A2A defines communication patterns for agents that delegate and exchange task state.

A2A defines communication patterns for agents that delegate and exchange task state. Values shown in the worked visual are illustrative unless the labels state otherwise.

How it works

It gives independent agent systems a shared way to advertise capabilities and manage tasks. It does not prescribe each agent’s internal reasoning loop.

A concrete example

Illustrative: a client sends one task, receives 3 status updates, then obtains one artifact.

Do not confuse it with MCP

A2A coordinates agents and tasks; MCP connects applications to tools and resources.

Study the full lesson