How do I get design principles and accessibility checklists for a mobile onboarding flow using raven-mcp?

{
  "surface": "mcp.ai-ravenmcp-raven-mcp",
  "package": "[email protected]",
  "server": "raven-mcp/1.6.1",
  "protocol": "2024-11-05",
  "tools": 32,
  "transport": "stdio",
  "calls": [
    {
      "tool": "get_principles",
      "args": {
        "context": "mobile app onboarding"
      },
      "result_preview": "76 principles returned, first: Touch Target Size (accessibility) — WCAG 2.5.5 recommends 44x44 CSS pixels minimum",
      "latency_ms": 5
    },
    {
      "tool": "search_knowledge",
      "args": {
        "query": "color contrast accessibility"
      },
      "result_preview": "56 results across principles/patterns layers, first: Color Contrast (accessibility)",
      "latency_ms": 2
    },
    {
      "tool": "get_checklist",
      "args": {
        "type": "accessibility"
      },
      "result_preview": "6-item checklist: contrast ratio, keyboard access, alt text, form labels, focus indicators, touch targets",
      "latency_ms": 2
    }
  ],
  "p50_init_ms": 140,
  "p50_call_ms": 2,
  "self_contained": true
}