[
  {
    "name": "end_session",
    "description": "End the current session.",
    "parameters": {
      "type": "object",
      "properties": {},
      "required": []
    }
  },
  {
    "name": "lookup_item",
    "description": "Search for a product by name, keyword, or item number. Returns matching products with item number, name, size, and price.",
    "parameters": {
      "type": "object",
      "properties": {
        "query": {
          "type": "string",
          "description": "Search query \u2014 a product name, keyword, or item number (e.g., 'sourdough loaf', 'maple', '1330')."
        }
      },
      "required": [
        "query"
      ]
    }
  },
  {
    "name": "process_order",
    "description": "Place a new delivery or pickup order. All required fields must be collected from the customer before calling.",
    "parameters": {
      "type": "object",
      "properties": {
        "customer_name": {
          "type": "string",
          "description": "The customer's full name."
        },
        "phone": {
          "type": "string",
          "description": "The customer's phone number."
        },
        "items": {
          "type": "array",
          "items": {
            "type": "object"
          },
          "description": "List of items to order, each with 'item_id', 'name', 'quantity', and 'unit_price'."
        },
        "delivery_address": {
          "type": "string",
          "description": "Delivery address. Omit or set to 'pickup' for in-store pickup."
        }
      },
      "required": [
        "customer_name",
        "phone",
        "items"
      ]
    }
  },
  {
    "name": "update_order",
    "description": "Modify an existing order \u2014 add, remove, or change quantity of an item.",
    "parameters": {
      "type": "object",
      "properties": {
        "order_id": {
          "type": "string",
          "description": "The order ID to update."
        },
        "action": {
          "type": "string",
          "description": "The action to perform: 'add', 'remove', or 'change_quantity'."
        },
        "item_name": {
          "type": "string",
          "description": "The product name."
        },
        "quantity": {
          "type": "integer",
          "description": "New quantity (for 'add' or 'change_quantity'). Omit for 'remove'."
        }
      },
      "required": [
        "order_id",
        "action",
        "item_name"
      ]
    }
  },
  {
    "name": "verify_details",
    "description": "Read back the full order details for customer confirmation, including all items, quantities, prices, and totals.",
    "parameters": {
      "type": "object",
      "properties": {
        "order_id": {
          "type": "string",
          "description": "The order ID to verify."
        }
      },
      "required": [
        "order_id"
      ]
    }
  }
]