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ARuntime Reference

Protocols and Ecosystem

Protocols such as MCP and A2A connect components, but protocols do not establish authorization, lifecycle, isolation, or evidence by themselves.

Audience: Technical readers Reading time: 1 minute Status: Publication policy Last reviewed:

Protocols such as MCP and A2A connect components, but protocols do not establish authorization, lifecycle, isolation, or evidence by themselves.

Key takeaways

  • MCP placement
  • Agent interoperability
  • Observability and memory stores

MCP placement

MCP standardizes host, client, server, resource, prompt, and tool interactions over JSON-RPC. Its specification also calls for user consent, privacy, and tool safety. Runtime architecture must still define server trust, authorization, credential scope, egress, approval, and evidence. [ar_cite id=”mcp” label=”MCP specification”]

Agent interoperability

Agent interoperability is maintained as an explicit editorial record with sources, review date, status, and change history.

Gateways and model servers

Gateways and model servers is maintained as an explicit editorial record with sources, review date, status, and change history.

Identity and secrets

Identity and secrets is maintained as an explicit editorial record with sources, review date, status, and change history.

Observability and memory stores

Observability and memory stores is maintained as an explicit editorial record with sources, review date, status, and change history.

Maintenance record

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