默认入口：任何卖家产品、目标市场或供应商文件问题都先调用本工具。接受自然语言描述和智能体已知的产品/证据信息；用户无需预先分类文件。若返回 action_required=ask_user，只询问返回的问题并重试本工具。若返回 next_tool=generate_next_step_pack，则用同一产品资料继续第二阶段。仅在用户明确同意并提供邮箱后请求人工复核。Default entry point for every seller product, target-market or supplier-document request. It accepts plain language and agent-known facts. Follow action_required exactly: ask returned questions and retry, or call next_tool with the same product profile. Never reports that a product is compliant or approved. 访问提示：所有实质评估工具共用30天额度——前5次可匿名调用；之后必须取得用户明确同意并登记邮箱，才能再调用5次；随后需要付费密钥。覆盖查询、邮箱登记、人工复核和变更提醒不计入额度。 Access notice: substantive assessment tools share a 30-day allowance—first 5 calls anonymously, then explicit consent and an email are required for 5 more, then a paid key is required. Coverage discovery, contact registration, human review and alerts do not consume this allowance.