Agent-created service health panel

Connect through Click’s temporary MCP descriptor, keep the paired window online, and call paired_click_action with click.canvas.create.

{
  "action_id": "click.canvas.create",
  "payload": {
    "title": "Service health",
    "html": "<main><h2>Service health</h2><output id=\"status\">Ready</output></main>",
    "css": "main { padding: 16px; }",
    "javascript": "",
    "permission_requests": []
  }
}

The action stores a content-addressed artifact, updates the synchronized workspace, opens the panel, and returns a correlated verification receipt. Add capability requests only when the panel genuinely needs Host data; undeclared operations fail before provider dispatch.

Iterate with click.canvas.inspect and click.canvas.update, then focus the result for human review. Never paste the temporary MCP token into panel source.