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Build and deploy AI applications on Azure AI Foundry using Microsoft's model catalog and AI services
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foundry-agent/create/references/tool-a2a.md
1# Tool — Agent-to-Agent (A2A, preview)23Call another Foundry agent as if it were a tool. Useful for composing specialist agents into an orchestrator.45## Toolbox shape67```json8{9"type": "a2a_preview",10"name": "<AGENT_NAME>",11"description": "<what this agent does>",12"base_url": "<AGENT_BASE_URL>",13"project_connection_id": "<connection_to_target_project>"14}15```1617Auth is either anonymous (for the same project) or via a project connection that holds credentials for the remote agent's host.1819## References2021- [A2A tool documentation](https://learn.microsoft.com/azure/foundry/agents/how-to/tools/agent-to-agent)22- [agent-tools.md](agent-tools.md) — tool index23