{
  "property_id": {"type": "domain", "value": "reddit.com"},
  "artifact_id": "r_fitness_abc123",
  "assets": [
    {"type": "text", "role": "title", "content": "Best protein sources for muscle building", "language": "en"},
    {"type": "text", "role": "paragraph", "content": "Looking for recommendations on high-quality protein sources...", "language": "en"},
    {"type": "text", "role": "paragraph", "content": "I've been lifting for 6 months and want to optimize my diet.", "language": "en"},
    {"type": "image", "url": "https://cdn.reddit.com/fitness-image.jpg", "alt_text": "Person lifting weights"}
  ]
}

{
  "verdict": "pass",
  "explanation": "This content aligns well with the brand's fitness-focused positioning. Health and fitness content is explicitly marked as 'ideal' in the policy. The discussion is constructive and educational.",
  "features": [
    {
      "feature_id": "brand_safety",
      "status": "passed",
      "explanation": "No safety concerns. Content is user-generated but constructive fitness discussion."
    },
    {
      "feature_id": "brand_suitability",
      "status": "passed",
      "explanation": "Fitness content matches brand's athletic positioning."
    }
  ]
}

{
  "verdict": "fail",
  "explanation": "This content discusses political topics which the policy explicitly excludes. While the article itself is balanced journalism, the brand has requested to avoid all controversial political content regardless of tone.",
  "features": [
    {
      "feature_id": "brand_safety",
      "status": "passed",
      "explanation": "No hate speech, illegal content, or explicit material."
    },
    {
      "feature_id": "brand_suitability",
      "status": "failed",
      "explanation": "Political content is excluded by brand policy, even when balanced."
    }
  ]
}

// Seller sends artifact to evaluate
const response1 = await a2a.send({
  message: {
    parts: [{
      kind: "data",
      data: {
        skill: "calibrate_content",
        parameters: {
          standards_id: "nike_brand_safety",
          artifact: {
            property_id: { type: "domain", value: "reddit.com" },
            artifact_id: "r_news_politics_123",
            assets: [
              { type: "text", role: "title", content: "Political News Article" }
            ]
          }
        }
      }
    }]
  }
});
// Response: verdict=fail with feature breakdown

// Seller asks follow-up question about the decision
const response2 = await a2a.send({
  contextId: response1.contextId,
  message: {
    parts: [{
      kind: "text",
      text: "This is factual news, not opinion. Should balanced journalism be excluded?"
    }]
  }
});
// Verification agent clarifies that brand policy excludes ALL political content

// Seller tries different artifact
const response3 = await a2a.send({
  contextId: response1.contextId,
  message: {
    parts: [{
      kind: "data",
      data: {
        skill: "calibrate_content",
        parameters: {
          standards_id: "nike_brand_safety",
          artifact: {
            property_id: { type: "domain", value: "reddit.com" },
            artifact_id: "r_running_tips_456",
            assets: [
              { type: "text", role: "title", content: "Running Tips" }
            ]
          }
        }
      }
    }]
  }
});
// Response: verdict=pass - now seller understands the boundaries

// Initial calibration request
const response1 = await mcp.call('calibrate_content', {
  standards_id: "nike_brand_safety",
  artifact: {
    property_id: { type: "domain", value: "reddit.com" },
    artifact_id: "r_news_politics_123",
    assets: [
      { type: "text", role: "title", content: "Political News Article" }
    ]
  }
});
// Response includes context_id for conversation continuity

// Continue dialogue with follow-up question
const response2 = await mcp.call('calibrate_content', {
  context_id: response1.context_id,
  standards_id: "nike_brand_safety",
  artifact: {
    property_id: { type: "domain", value: "reddit.com" },
    artifact_id: "r_news_politics_123",
    assets: [
      { type: "text", role: "title", content: "Political News Article" }
    ]
  }
});
// Include text message in the protocol envelope asking about balanced journalism

// Try different artifact in same conversation
const response3 = await mcp.call('calibrate_content', {
  context_id: response1.context_id,
  standards_id: "nike_brand_safety",
  artifact: {
    property_id: { type: "domain", value: "reddit.com" },
    artifact_id: "r_running_tips_456",
    assets: [
      { type: "text", role: "title", content: "Running Tips" }
    ]
  }
});