Evidence row 567722

What was observed

{
  "count": 5,
  "tools": [
    {
      "description": "Create a pre-filled shopping cart URL for Rakentaja Outlet.\n\nGiven a list of product IDs and quantities, returns a URL that the\nuser can open in their browser. When they open the link, the items\nare added to their browser cart session, and they are redirected\neither to the cart page (default) or directly to checkout.\n\nThis tool is FULLY SIDE-EFFECT-FREE: it does not create the cart on\nthe server, does not touch any database, and does not modify any\nstate. The cart materializes only when the user chooses to open the\nURL. This is a deliberate security design — the user always\napproves cart contents visibly before the state change happens.\n\nArgs:\n    items: List of {\"product_id\": int, \"quantity\": int} dicts.\n        Maximum 20 items, maximum quantity 50 per line.\n        Use `search_catalog` + `get_product_details` to find IDs first.\n    checkout: If True, the link takes the user directly to checkout\n        (skipping the cart review page). Default False — user sees\n        the cart first, which is safer and more transparent.\n\nReturns:\n    JSON with:\n    - url: the browser URL to give the user. Contains all cart items\n      as query parameters. Opening it will populate their cart.\n    - items: deduplicated items list that will be added (same product_id\n      appearing multiple times is merged with combined quantity)\n    - total_lines: number of unique products in the link\n    - total_quantity: sum of quantities across all products\n    - checkout: echoed checkout flag\n    - disclaimer: legal notice about approval flow\n\n    On error, raises MCP ToolError → response has isError:true with\n    structured JSON: {\"error\": {\"code\": \"empty_items\" | \"too_many_items\"\n    | \"invalid_item\" | \"quantity_too_large\" | \"products_not_found\"\n    | \"backend_unavailable\", \"message\": \"...\", \"field\": null,\n    \"retryable\": true|false}}. The StructuredErrorMiddleware ensures\n    consistent format across all tools.\n\nExample:\n    create_cart_link(items=[\n        {\"product_id\": 9437, \"quantity\": 2},\n        {\"product_id\": 4927, \"quantity\": 1},\n    ])\n    → {\"url\": \"https://rakentajaoutlet.fi/mcp-backend/lisaa-kori?items=9437:2,4927:1\", ...}",
      "inputSchema": {
        "properties": {
          "checkout": {
            "default": false,
            "description": "If True, link goes directly to checkout; otherwise to cart review page",
            "type": "boolean"
          },
          "items": {
            "description": "Cart items (1-20 lines)",
            "items": {
              "description": "One line in the cart URL.",
              "properties": {
                "product_id": {
                  "description": "Product ID from search_catalog results",
                  "minimum": 1,
                  "type": "integer"
                },
                "quantity": {
                  "description": "Quantity to add (1-50)",
                  "maximum": 50,
                  "minimum": 1,
                  "type": "integer"
                }
              },
              "required": [
                "product_id",
                "quantity"
              ],
              "type": "object"
            },
            "maxItems": 20,
            "minItems": 1,
            "type": "array"
          }
        },
        "required": [
          "items"
        ],
        "type": "object"
      },
      "name": "create_cart_link"
    },
    {
      "description": "Get full details for a single Rakentaja Outlet product.\n\nFetches both the product record and a real-time availability check\nin parallel. Use this after `search_catalog` returns a product ID\nto show the user complete information (full description, all images,\ncurrent stock).\n\nArgs:\n    product_id: Product ID from `search_catalog` results (integer).\n\nReturns:\n    JSON with product details:\n    - id, name, sku, ean, brand, category\n    - description (full HTML/text), description_short\n    - price_gross (incl. 25.5% VAT), price_net, vat_percent, currency\n    - available_for_order (bool), availability_status (\"in_stock\" |\n      \"supplier_stock\" | \"out_of_stock\"), estimated_delivery_min_days,\n      estimated_delivery_max_days\n    - in_stock, stock_quantity, supplier_in_stock, supplier_stock_quantity\n      (raw fields — prefer available_for_order + availability_status)\n    - weight_kg, unit\n    - product_url (direct link to product page)\n    - image_url (main image), images (list of all image URLs)\n    - availability: fresh stock check result (may be more current than\n      stock_quantity if inventory changed since catalog was cached)\n    - disclaimer: legal notice that prices are indicative\n\n    On error, raises MCP ToolError → response has isError:true with\n    structured JSON: {\"error\": {\"code\": \"not_found\" | \"invalid_argument\"\n    | \"backend_unavailable\", \"message\": \"...\", \"field\": null|str,\n    \"retryable\": true|false}}. The StructuredErrorMiddleware ensures\n    the format is consistent across all tools.\n\nNotes:\n    - Prices include Finnish 25.5% VAT. Business buyers see price_net\n      for VAT-registered net price.\n    - Pass `product_url` to the user for viewing or adding to cart —\n      do not attempt to add to cart via this tool (use create_cart_link).",
      "inputSchema": {
        "properties": {
          "product_id": {
            "description": "Product ID from search_catalog results",
            "minimum": 1,
            "type": "integer"
          }
        },
        "required": [
          "product_id"
        ],
        "type": "object"
      },
      "name": "get_product_details"
    },
    {
      "description": "Search Rakentaja Outlet product catalog.\n\nRakentaja Outlet (rakentajaoutlet.fi) is a Finnish online store specializing\nin electrical and construction supplies at outlet prices (~4000 products).\nAll prices in EUR including 25.5% Finnish VAT.\n\nArgs:\n    query: Free-text search — matches product name, SKU, EAN code, or\n        category name. Leave empty to browse without a search term.\n    category_id: Filter to products in a specific category (integer ID).\n        The full list of categories is available at\n        https://rakentajaoutlet.fi/api/categories — this is a public\n        REST endpoint, not an MCP tool. Combines with query if both given.\n    in_stock_only: If True (default), only show products currently in\n        stock (either in own warehouse or at supplier). Set to False\n        to include out-of-stock products in results.\n    sort: Sort order — \"name\" (default), \"price_asc\", \"price_desc\",\n        or \"newest\". Ignored when query is given; search results are\n        ordered by relevance instead.\n    limit: Maximum products to return (1-50, default 10). Use a small\n        limit for interactive queries; larger for bulk listing.\n    page: Page number for paginated results (default 1). Combine with\n        `limit` to page through results larger than the limit.\n\nReturns:\n    JSON with keys:\n    - products: list of product summaries with:\n      - id, name, category, brand, sku, ean, unit\n      - price_gross (incl. 25.5% VAT), price_net, currency\n      - description (max 200 chars, description_truncated=true for longer)\n      - available_for_order: boolean — can the customer place an order?\n        (TRUE if in own stock OR supplier stock available)\n      - availability_status: \"in_stock\" | \"supplier_stock\" | \"out_of_stock\"\n      - estimated_delivery_min_days / _max_days: delivery estimate (or null)\n      - in_stock, stock_quantity, supplier_in_stock, supplier_stock_quantity\n        (raw fields — prefer available_for_order + availability_status)\n      - product_url, image_url\n    - total: total matching products across all pages\n    - page: current page number\n    - per_page: products per page (== limit)\n    - total_pages: total pages available\n    - disclaimer: legal notice that prices are indicative and confirmed\n      at checkout\n\nNotes:\n    - Prices include Finnish 25.5% VAT (price_gross) and net price\n      (price_net) is shown for VAT-registered business buyers.\n    - product_url is a direct link to the product page — pass this to\n      the user for viewing or adding to cart.\n    - Use `get_product_details(id)` for full description and stock check.",
      "inputSchema": {
        "properties": {
          "category_id": {
            "anyOf": [
              {
                "minimum": 1,
                "type": "integer"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "description": "Category ID (see https://rakentajaoutlet.fi/api/categories for the list)"
          },
          "in_stock_only": {
            "default": true,
            "type": "boolean"
          },
          "limit": {
            "default": 10,
            "description": "Max products to return (1-50)",
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "page": {
            "default": 1,
            "description": "Page number (>= 1)",
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "default": "",
            "description": "Free-text search term",
            "type": "string"
          },
          "sort": {
            "default": "name",
            "enum": [
              "name",
              "price_asc",
              "price_desc",
              "newest"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_catalog"
    },
    {
      "description": "Search Rakentaja Outlet product catalog.\n\nRakentaja Outlet (rakentajaoutlet.fi) is a Finnish online store specializing\nin electrical and construction supplies at outlet prices (~4000 products).\nAll prices in EUR including 25.5% Finnish VAT.\n\nArgs:\n    query: Free-text search — matches product name, SKU, EAN code, or\n        category name. Leave empty to browse without a search term.\n    category_id: Filter to products in a specific category (integer ID).\n        The full list of categories is available at\n        https://rakentajaoutlet.fi/api/categories — this is a public\n        REST endpoint, not an MCP tool. Combines with query if both given.\n    in_stock_only: If True (default), only show products currently in\n        stock (either in own warehouse or at supplier). Set to False\n        to include out-of-stock products in results.\n    sort: Sort order — \"name\" (default), \"price_asc\", \"price_desc\",\n        or \"newest\". Ignored when query is given; search results are\n        ordered by relevance instead.\n    limit: Maximum products to return (1-50, default 10). Use a small\n        limit for interactive queries; larger for bulk listing.\n    page: Page number for paginated results (default 1). Combine with\n        `limit` to page through results larger than the limit.\n\nReturns:\n    JSON with keys:\n    - products: list of product summaries with:\n      - id, name, category, brand, sku, ean, unit\n      - price_gross (incl. 25.5% VAT), price_net, currency\n      - description (max 200 chars, description_truncated=true for longer)\n      - available_for_order: boolean — can the customer place an order?\n        (TRUE if in own stock OR supplier stock available)\n      - availability_status: \"in_stock\" | \"supplier_stock\" | \"out_of_stock\"\n      - estimated_delivery_min_days / _max_days: delivery estimate (or null)\n      - in_stock, stock_quantity, supplier_in_stock, supplier_stock_quantity\n        (raw fields — prefer available_for_order + availability_status)\n      - product_url, image_url\n    - total: total matching products across all pages\n    - page: current page number\n    - per_page: products per page (== limit)\n    - total_pages: total pages available\n    - disclaimer: legal notice that prices are indicative and confirmed\n      at checkout\n\nNotes:\n    - Prices include Finnish 25.5% VAT (price_gross) and net price\n      (price_net) is shown for VAT-registered business buyers.\n    - product_url is a direct link to the product page — pass this to\n      the user for viewing or adding to cart.\n    - Use `get_product_details(id)` for full description and stock check.",
      "inputSchema": {
        "properties": {
          "category_id": {
            "anyOf": [
              {
                "minimum": 1,
                "type": "integer"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "description": "Category ID (see https://rakentajaoutlet.fi/api/categories for the list)"
          },
          "in_stock_only": {
            "default": true,
            "type": "boolean"
          },
          "limit": {
            "default": 10,
            "description": "Max products to return (1-50)",
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "page": {
            "default": 1,
            "description": "Page number (>= 1)",
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "default": "",
            "description": "Free-text search term",
            "type": "string"
          },
          "sort": {
            "default": "name",
            "enum": [
              "name",
              "price_asc",
              "price_desc",
              "newest"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_shop_catalog"
    },
    {
      "description": "Search Rakentaja Outlet shop policies, FAQ, and store info.\n\nSearches across 8 pages: About Us (tietoa-meista), FAQ\n(usein-kysyttya), Delivery terms (toimitusehdot), Privacy Policy\n(tietosuoja), Terms of Use (kayttoehdot), Return Form (peruutuslomake),\nPayment Methods (maksutavat), AI Agent Guide (ai).\n\nUse this tool when the user asks about:\n  - Delivery times and costs (\"toimitusaika\", \"toimituskulu\")\n  - Returns and refunds (\"palautus\", \"peruutus\", \"hyvitys\")\n  - Payment methods (\"maksutavat\", \"lasku\")\n  - Privacy or GDPR (\"tietosuoja\", \"GDPR\")\n  - Terms of use (\"käyttöehdot\")\n  - Company information (\"Sanere Oy\", \"yhteystiedot\", \"Y-tunnus\")\n  - Any general question about buying from the store\n\nArgs:\n    query: Free-text search term (Finnish). Case-insensitive.\n        Leave empty to get an overview of all policy pages.\n    limit: Maximum sections to return (1-10, default 5). Each section\n        is a paragraph or Q&A pair; longer content is truncated.\n\nReturns:\n    JSON with:\n    - sections: list of matching sections, each with:\n      - page_slug: e.g. \"usein-kysyttya\"\n      - page_title: e.g. \"Usein kysyttyä\"\n      - page_url: full URL to the page\n      - heading: section heading if any\n      - text: matching text content (may be truncated)\n      - is_faq: True if this is a Q&A from the FAQ page\n    - total_matches: total sections matched\n    - query: echoed query\n    - available_pages: list of all policy page slugs\n    - disclaimer: legal reminder to check the full page\n\nNotes:\n    - Policies are the authoritative source; if unclear, direct the\n      user to the page_url for the full text.\n    - Some FAQ entries are marked with FAQPage schema.org markup —\n      these show up as Google rich results.",
      "inputSchema": {
        "properties": {
          "limit": {
            "default": 5,
            "description": "Max sections to return (1-10)",
            "maximum": 10,
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "default": "",
            "description": "Free-text search term (Finnish)",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_shop_policies_and_faqs"
    }
  ]
}

What the leaf hashes

{"body":"418e505902112249f9f704f8c40de4a0d1a6c61b8de1dedb2b65eab998f40a44","id":567722,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793138807027461,"prev":null,"subject":"cdb16303-8533-485a-a143-e73bad471bc7","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0xf8c79aeab3a6af4178c3566f21ed455bc2af73010db70b8c2c00fdcbd239dfc8
2. 0xd5081b8b7328ff5d6455582431d0890442b3c0825f7eccb80fb5b9ffb01e5f17
3. 0xabb99a3a35b9d4343bec42cdc30b7390b1a58b387941840576e579aed067910e
4. 0xade4041898076518e97df3f69885bd47ae2a5f01349ea9bf53cdac7c6095ca23
5. 0x48c3267299d6f04405eff322d555f4558cb9f6e8a140b92b144e7f2d0406c9f1
6. 0x86a9c683b658152174c84a529b427eec6b8a622a63b4eab5bc1a5c57168cca05
7. 0xfe69b8d5cc599afb42e1962760a28cb5ed134b5e010193522580f41a4da1bed8
8. 0x5c97fbf8fb8ed07f45c2d83d904ea6a4758be83a89fa1dfc1f92e0a2fd4a2896
9. 0xe9faf7e227ec3a53f0a1ca841671a37905b2c9657ecb1d62f0c27a9f239c79a1
10. 0xb216d7be3719888c5905d4d551a416130bdb347b2c87c55396c45675287fdff5
11. 0x0910ffa4c5b68bfeab876c95d437a268cbe3ce3065ac289e0ccc44dd931c928a
12. 0x3d6ce9e9447d644baa93c05c5ec0a44778000bfa82e0208f4a0086c782198964
13. 0x2cba9be288dab78cb9c5f54fa13242712b2493da9f833a7c3cdd92cde60662b0
14. 0x94d3785ce9330e4580bccada5459380aa2aac76a0bf11354d1353b375afc17d2
15. 0xb5b652bba4a5afca56c21031d89b1c06361563aaf54ccc8541c296ceeb2b66fa

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4