AI Glossary

A2A

Also called Agent2Agent protocol

What does “A2A” mean?

A2A: Open protocol, introduced by Google and now hosted by the Linux Foundation, for letting agents built by different vendors discover each other, describe their abilities and pass tasks back and forth. Where MCP links an agent to tools, A2A links agents to other agents.

A2A visual guide: Open protocol, introduced by Google and now hosted by the Linux Foundation, for letting agents built by different vendors discover each other, describe their abilities and pass tasks back and forth. Where MCP links an agent to tools, A2A links agents to other agents.
Visual guide Open full size (new tab)

What is an example of “A2A”?

A travel-booking agent could hand a visa question to a separate immigration-specialist agent run by another company.

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See also

Model Context ProtocolTermMulti-agent systemTermHandoffTerm

Same topic

Agent evalsTermAgent guardrailsTermAgent loopTermAgent memoryTermAgent permissionsTerm