{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "additionalProperties": false,
  "properties": {
    "catalog_reference": {
      "$ref": "tool-schema-catalog-reference.schema.json"
    },
    "item_reference": {
      "oneOf": [
        {
          "$ref": "tool-schema-reference.schema.json"
        },
        {
          "type": "null"
        }
      ]
    },
    "schema_version": {
      "const": "contextguard-receipt-tool-schema-expansion-request/v1"
    }
  },
  "required": [
    "catalog_reference",
    "item_reference",
    "schema_version"
  ],
  "title": "Context Guard Receipt tool-schema expansion request",
  "type": "object"
}