[
  {
    "name": "search_drugs",
    "description": "Search drugs by brand name, generic name, or YJ code. Returns list of matching drugs with yj_code, brand name, generic name, and category.",
    "inputSchema": {
      "type": "object",
      "properties": {
        "query": {
          "type": "string",
          "description": "Search query: drug brand name, generic name, or YJ code."
        },
        "kind": {
          "type": "string",
          "enum": ["auto", "brand", "generic", "yj"],
          "description": "Search type. 'auto' searches all fields.",
          "default": "auto"
        },
        "limit": {
          "type": "integer",
          "description": "Maximum number of results.",
          "default": 10
        }
      },
      "required": ["query"]
    }
  },
  {
    "name": "list_categories",
    "description": "List all L1/L2 drug categories (pharmacological classification) with drug counts per category.",
    "inputSchema": {
      "type": "object",
      "properties": {}
    }
  },
  {
    "name": "list_drugs_in_category",
    "description": "List all drugs (generic → brand names) under a specific L2 pharmacological category code.",
    "inputSchema": {
      "type": "object",
      "properties": {
        "l2_code": {
          "type": "string",
          "description": "3-digit L2 category code."
        },
        "limit_generics": {
          "type": "integer",
          "description": "Maximum number of generic names to return.",
          "default": 50
        }
      },
      "required": ["l2_code"]
    }
  },
  {
    "name": "get_drug_master",
    "description": "Get basic information for a drug by yj_code: brand name, generic name, pharmacological category, regulatory classification, manufacturer, revision date.",
    "inputSchema": {
      "type": "object",
      "properties": {
        "yj_code": {
          "type": "string",
          "description": "12-character YJ code."
        }
      },
      "required": ["yj_code"]
    }
  },
  {
    "name": "get_drug_interactions",
    "description": "Search drug interactions. With drug_a only: all interactions for that drug. With both drug_a and drug_b: bidirectional interaction between A and B. Filter by severity (併用禁忌/併用注意) or keyword.",
    "inputSchema": {
      "type": "object",
      "properties": {
        "drug_a_yj": {
          "type": "string",
          "description": "YJ code for drug A."
        },
        "drug_b_yj": {
          "type": "string",
          "description": "YJ code for drug B (optional, for pairwise lookup)."
        },
        "severity": {
          "type": "string",
          "description": "Filter by severity: '併用禁忌' or '併用注意'."
        },
        "keyword": {
          "type": "string",
          "description": "Search keyword in drug_b_class, mechanism, or clinical_effect."
        },
        "limit": {
          "type": "integer",
          "description": "Maximum number of results.",
          "default": 30
        }
      }
    }
  },
  {
    "name": "get_drug_restrictions",
    "description": "Search drug restrictions (contraindications, precautions) by patient condition. condition_type options: 疾患, 腎機能障害, 肝機能障害, 生殖能, 妊婦, 授乳婦, 小児等, 高齢者, 過敏症, 遺伝子多型, その他. severity options: 禁忌, 原則禁忌, 慎重投与.",
    "inputSchema": {
      "type": "object",
      "properties": {
        "drug_yj": {
          "type": "string",
          "description": "YJ code for the drug."
        },
        "condition_type": {
          "type": "string",
          "description": "Patient condition type to filter by."
        },
        "severity": {
          "type": "string",
          "description": "Filter by severity: 禁忌, 原則禁忌, or 慎重投与."
        },
        "keyword": {
          "type": "string",
          "description": "Search keyword in condition_text."
        },
        "limit": {
          "type": "integer",
          "description": "Maximum number of results.",
          "default": 30
        }
      }
    }
  },
  {
    "name": "get_drug_dosing",
    "description": "Get dosing information for a drug, optionally filtered by patient segment. patient_segment options: 成人, 小児等, 高齢者, 腎機能障害患者, 肝機能障害患者, 透析患者, 妊婦.",
    "inputSchema": {
      "type": "object",
      "properties": {
        "drug_yj": {
          "type": "string",
          "description": "YJ code for the drug."
        },
        "patient_segment": {
          "type": "string",
          "description": "Patient segment to filter by (e.g., 成人, 高齢者, 腎機能障害患者)."
        },
        "limit": {
          "type": "integer",
          "description": "Maximum number of results.",
          "default": 20
        }
      },
      "required": ["drug_yj"]
    }
  },
  {
    "name": "search_section_text",
    "description": "Full-text search in drug package insert sections. Returns matching sections with snippets. Use section_filter to narrow by chapter title (e.g., '副作用', '禁忌', '妊婦', '相互作用').",
    "inputSchema": {
      "type": "object",
      "properties": {
        "keyword": {
          "type": "string",
          "description": "Search keyword."
        },
        "section_filter": {
          "type": "string",
          "description": "Filter by section title substring (e.g., '副作用', '禁忌', '妊婦').",
          "default": ""
        },
        "limit": {
          "type": "integer",
          "description": "Maximum number of results.",
          "default": 30
        }
      },
      "required": ["keyword"]
    }
  },
  {
    "name": "list_drug_chapters",
    "description": "List all chapter titles for a drug's package insert. Use yj_full (full YJ code with revision suffix). Returns section titles with line numbers.",
    "inputSchema": {
      "type": "object",
      "properties": {
        "yj_full": {
          "type": "string",
          "description": "Full YJ code (with revision suffix, e.g., 3399007H1021_1_21)."
        }
      },
      "required": ["yj_full"]
    }
  },
  {
    "name": "read_drug_chapter",
    "description": "Read the verbatim text of a specific chapter from a drug's package insert. section_title must match exactly from list_drug_chapters output.",
    "inputSchema": {
      "type": "object",
      "properties": {
        "yj_full": {
          "type": "string",
          "description": "Full YJ code."
        },
        "section_title": {
          "type": "string",
          "description": "Exact section title from list_drug_chapters (e.g., '9.2 腎機能障害患者', '11.1 重大な副作用')."
        }
      },
      "required": ["yj_full", "section_title"]
    }
  }
]