A2A / MCP Integration

This section is advisory.

A2A (Agent-to-Agent) and MCP (Model Context Protocol) provide agent discovery and capability interfaces. Legal context integrates through metadata and tool definitions.

A2A Agent Card Metadata

The Agent Card is the A2A discovery mechanism — the equivalent of a service manifest. Include a legalContext reference to point agents to the service's legal terms:

{
  "legalContext": {
    "type": "url",
    "value": "https://example.com/.well-known/legal-context.json"
  }
}

This tells any discovering agent where to find the legal context before initiating a task or transaction.

MCP Tool Definitions

Legal context operations can be exposed as MCP tools, enabling agents to interact with legal infrastructure through the standard MCP tool interface:

• Query terms — retrieve the current terms for a service
• Verify document — check a document against a known contentHash
• File dispute — initiate a dispute through a structured process
• Check status — query the state of an agreement or dispute

This turns the legal context layer into a capability that agents can discover and use through their native tool interface, rather than a separate integration path.

Integration Flow

1. Agent discovers a service via A2A Agent Card
2. Agent reads the legalContext reference from the card
3. Agent fetches /.well-known/legal-context.json from the referenced URL
4. Agent evaluates the terms before engaging
5. During the task, agent uses MCP tools for verification, acceptance, or dispute operations as needed