Evidence row 579816

What was observed

{
  "count": 5,
  "tools": [
    {
      "description": "Retrieve one exact SVG icon using an exact ref returned by search_icons, recommend_icons, or preview_icons. Do not guess icon IDs. Use search_icons first if the user only described a concept. Returns SVG code, explicit public library labels, visual preview URL, and public semantic guidance for the exact icon.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "id": {
            "description": "Exact icon ID without the library prefix, for example \"database\", \"user-circle\", \"brain-circuit\", or \"arrow-down\".",
            "type": "string"
          },
          "library": {
            "description": "Required library key for the exact icon. Supported values include si (Supericons AI and developer tool logos), lucide, tabler, phosphor, heroicons, bootstrap, iconoir, ionicons, material, simpleicons (Simple Icons brand logos), and mingcute.",
            "type": "string"
          },
          "style": {
            "default": "any",
            "description": "Optional style preference. Material Symbols supports outline and solid. Other hosted libraries report their verified styles in list_libraries.",
            "enum": [
              "any",
              "outline",
              "solid"
            ],
            "type": "string"
          }
        },
        "required": [
          "id",
          "library"
        ],
        "type": "object"
      },
      "name": "get_icon"
    },
    {
      "description": "List the free icon libraries available through the hosted Supericons MCP server. Use this before filtering by library or when a user asks which icon libraries are supported.",
      "inputSchema": {
        "properties": {},
        "type": "object"
      },
      "name": "list_libraries"
    },
    {
      "description": "Refine an icon result set or preview known icon refs returned by another Supericons tool. Use search_icons first for normal icon requests. Icon lists up to 100 refs are accepted and safely truncated to 12. Returns ready-to-use Markdown, a hosted preview fallback, a direct PNG image URL, and, when requested, an MCP image contact sheet.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "icon_refs": {
            "description": "Optional fixed icon refs in library:id format. Arrays, a single ref, and comma-separated refs are accepted. Up to 100 are accepted, 24 appear on the browser preview, and 12 are rendered inline. Send at most 100; very large arrays are refused.",
            "items": {
              "type": "string"
            },
            "minItems": 1,
            "type": "array"
          },
          "include_image": {
            "default": true,
            "description": "When true, include a PNG contact sheet as MCP image content. Boolean strings are accepted. A preview_url is always returned.",
            "type": "boolean"
          },
          "library": {
            "$ref": "#/properties/query",
            "description": "Optional library key. Supported values include si (Supericons AI and developer tool logos), lucide, tabler, phosphor, heroicons, bootstrap, iconoir, ionicons, material, simpleicons (Simple Icons brand logos), and mingcute."
          },
          "limit": {
            "default": 12,
            "description": "Requested inline icon count. Values outside 1 to 12 are safely clamped with a warning. Numeric strings are accepted.",
            "type": [
              "number",
              "string"
            ]
          },
          "locale": {
            "$ref": "#/properties/query",
            "description": "Optional locale for multilingual search terms. Supported values: zh-Hans, zh-Hant, ja, ko, es, de, pt, ar, hi, vi, th. Unsupported values are ignored with a warning."
          },
          "query": {
            "description": "Optional search query to preview visually, for example \"license plate recognition camera scan car\".",
            "type": "string"
          },
          "style": {
            "$ref": "#/properties/query",
            "default": "any",
            "description": "Optional style preference. Unsupported values are ignored with a warning."
          }
        },
        "type": "object"
      },
      "name": "preview_icons"
    },
    {
      "description": "Recommend a coherent icon set for up to 20 named UI slots in one call. Uses task context to narrow ambiguous meanings. When context is insufficient, returns needs_clarification with labeled interpretation options instead of guessing. Invalid inputs and service failures return a plain-language reason and a next step instead of a bare protocol error. Returns one recommendation and optional alternatives for each resolved slot, with explicit public library labels and visual preview URLs where available. Library key si means Supericons, not Simple Icons.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "include_query_frame": {
            "default": false,
            "description": "Optional public-safe diagnostics for query understanding. Boolean strings are accepted. Leave false for normal compact responses.",
            "type": "boolean"
          },
          "library": {
            "$ref": "#/properties/task",
            "description": "Optional library key when the user wants a consistent icon family. Supported values include si (Supericons AI and developer tool logos), lucide, tabler, phosphor, heroicons, bootstrap, iconoir, ionicons, material, simpleicons (Simple Icons brand logos), and mingcute."
          },
          "limit_per_slot": {
            "default": 3,
            "description": "Number of choices per slot. Values outside 1 to 5 are clamped with a warning. Numeric strings are accepted.",
            "type": [
              "number",
              "string"
            ]
          },
          "locale": {
            "$ref": "#/properties/task",
            "description": "Optional locale for multilingual slot labels. Unsupported values are ignored with a warning."
          },
          "response_mode": {
            "$ref": "#/properties/task",
            "default": "plan",
            "description": "Response size mode: plan, assets, or full. Unsupported values use plan with a warning."
          },
          "slots": {
            "default": [],
            "description": "List of 1 to 20 UI slots to fill, for example [\"model\", \"prompt\", \"dataset\", \"evaluation\"]. A single string is accepted as one slot. Lists of up to a few hundred slots return a structured split instruction; send at most 20 per call.",
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "style": {
            "$ref": "#/properties/task",
            "default": "any",
            "description": "Optional style preference. Unsupported values are ignored with a warning."
          },
          "task": {
            "default": "",
            "description": "Overall UI task, for example \"choose icons for an AI dashboard sidebar\" or \"select bottom navigation icons for a finance app\". Missing task text returns a structured recovery message.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "recommend_icons"
    },
    {
      "description": "Use this as the main icon tool. Search 20,000+ curated SVG icons across 11 libraries by meaning, label, visual description, tags, and synonyms. When matches exist, the response includes a paste-ready suggested answer, a direct preview image, and Markdown that can show the image in the final reply. When no supported match exists, it returns an honest structured no-result with a next step and no fabricated icon. If you choose a library yourself, use prefer. Use strict only when the user explicitly requires that library. Library key si means Supericons, not Simple Icons.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "include_query_frame": {
            "default": false,
            "description": "Optional public-safe diagnostics for query understanding. Boolean strings are accepted. Leave false for normal compact responses.",
            "type": "boolean"
          },
          "library": {
            "description": "Optional library key only when the user named a library. Omit it to search all libraries. Do not use all as a library key. Supported values include si (Supericons AI and developer tool logos), lucide, tabler, phosphor, heroicons, bootstrap, iconoir, ionicons, material, simpleicons (Simple Icons brand logos), and mingcute.",
            "type": "string"
          },
          "library_mode": {
            "$ref": "#/properties/library",
            "description": "Optional library behavior. Omit a self-chosen library and search all, or use prefer with that library. Use strict only when the user explicitly requires the named library. All searches every eligible library. Unsupported or incomplete combinations are safely normalized with a warning."
          },
          "limit": {
            "default": 10,
            "description": "Maximum number of icons from 1 to 50. Numeric strings are accepted.",
            "maximum": 50,
            "minimum": 1,
            "type": "number"
          },
          "locale": {
            "$ref": "#/properties/library",
            "description": "Optional locale for multilingual search terms. Supported values: zh-Hans, zh-Hant, ja, ko, es, de, pt, ar, hi, vi, th. Unsupported values are ignored with a warning."
          },
          "query": {
            "description": "Icon concept or search phrase, for example \"database\", \"user profile\", \"chill\", \"trash\", \"upload cloud\", \"AI model\", or \"beautiful\".",
            "minLength": 1,
            "type": "string"
          },
          "style": {
            "$ref": "#/properties/library",
            "default": "any",
            "description": "Optional style preference. Unsupported values are ignored with a warning."
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "search_icons"
    }
  ]
}

What the leaf hashes

{"body":"8cfb8744f6fe41c90c74675a150c6fd211f3c5fd04f7608f6caa2c7702efabe9","id":579816,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793143557026997,"prev":null,"subject":"1d1f9aac-76a0-41c6-b02b-28b1085eebf1","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. 0x5ce1e49b75605d7e1bd10c61eb23091500456cd9b2035ff6e70f44e26f8efa97
2. 0xdefa8428a9ca17e0503c6302fd48c4b69c113351f5f0256f762c430d2e9dd0e9
3. 0x5b4019fccf290cbf972209696253ddb181810c15e3a66518fd49b5f462daedce
4. 0xba8083932fff108e99dfaf62c7b5f95998092ee8ce7e92759d5c97b5b9deb31d
5. 0x904185258a1bad5616309b30bb2d0d73532f2bce89a9f3004ac369296f843ce3
6. 0x2e4aa85dcff821751c8df87cb8d1df24be0bb7f96060dc7ffb4948ae6421da97
7. 0x892f6f0376c3a113ae02cfcaf40b59b32f5226fd997f20d5545208eb6a7afd03
8. 0x7772e9ea8205702d799bb7551979c7fcaf62e6d61c1616267254261f1c105a58
9. 0x2ebf676dd51a4c448b4a226209c19180127a216cbfbc33d15ef9e493d4ad2fd3
10. 0x3d22d634571ba72c183e235f8080fb451105de49426266f015f163e6a5c09b1b
11. 0x2852744b47bc9835dedf6e89aec877e57a0e0ed97b36700cae3173aefff12cb5
12. 0x548136c1e3ccb412bb6e8b0e92df8bd9db651531331fa2a46332b9c2956172f5
13. 0xeaf6b21867367f85a965f982b6593c42eafe4fdf74e94b675523a6478de49a54
14. 0x4277e02be0b5d91d78bc2247e37d402572474ba896c2e8f45765c8dc4e244d36
15. 0x6f00f0da417f4126951ba8ba9b7962c847e91f5c61364ad9ad47e5f979698a60
16. 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4