{
  "name": "anquanqi",
  "description": "输入上次月经开始日期和周期长度，计算安全期、危险期和排卵日",
  "category": "实用工具",
  "ui_url": "/tools/anquanqi/",
  "api_url": "/api/anquanqi/",
  "method": "POST",
  "parameters": {
    "last_period": { "type": "string", "required": true, "description": "上次月经开始日期（YYYY-MM-DD）" },
    "cycle_length": { "type": "number", "required": false, "description": "月经周期长度（天，默认28）" }
  },
  "response": {
    "cycle_length": "周期长度",
    "ovulation_day": "预计排卵日（相对）",
    "phases": "各阶段说明"
  },
  "example": { "last_period": "2026-05-01", "cycle_length": 28 }
}