Evidence row 259108

What was observed

{
  "count": 5,
  "tools": [
    {
      "description": "Everything about one character: what it is, its name, block, script, category, HTML, CSS, JavaScript, and UTF-8/UTF-16 codes, aliases, emoji and Han data, and related characters.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "character": {
            "description": "U+2192, 2192, or the character itself (→)",
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "character"
        ],
        "type": "object"
      },
      "name": "get_character"
    },
    {
      "description": "Hand-picked sets of characters people use most. Collections: selected (Selected characters).",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "slug": {
            "default": "selected",
            "description": "The collection's slug",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "get_collection"
    },
    {
      "description": "A Unicode block's characters in codepoint order, 200 at a time. Pass the returned cursor to get the next ones.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "block": {
            "description": "Block name, e.g. Box Drawing (see list_blocks)",
            "minLength": 1,
            "type": "string"
          },
          "cursor": {
            "description": "From the previous call, for the next characters",
            "type": "string"
          }
        },
        "required": [
          "block"
        ],
        "type": "object"
      },
      "name": "list_block_characters"
    },
    {
      "description": "Every Unicode block that has characters, in codepoint order, with its character count.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {},
        "type": "object"
      },
      "name": "list_blocks"
    },
    {
      "description": "Find Unicode characters by name, alias, keyword, codepoint, the character itself, or meaning (\"tick\" finds ✓, \"return key\" finds ⏎). Best matches first.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "block": {
            "description": "Only this Unicode block, e.g. Arrows",
            "type": "string"
          },
          "category": {
            "description": "General_Category: S for symbols, Sm for math symbols, L for letters…",
            "type": "string"
          },
          "emoji": {
            "description": "Only emoji (true) or only non-emoji (false)",
            "type": "boolean"
          },
          "limit": {
            "default": 10,
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "description": "What to look for: a name, a description, a codepoint like U+2192, or a character",
            "minLength": 1,
            "type": "string"
          },
          "script": {
            "description": "Only this script, by name or ISO code, e.g. Greek",
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "search_characters"
    }
  ]
}

What the leaf hashes

{"body":"bb6f96b94fe1ac6728c35f20e118fa2bd654117473621c9d59d00a06a705cf54","id":259108,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793030631886220,"prev":null,"subject":"45c76c39-ba79-4034-bb48-a373b0e71f6e","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0xc46ee40abfb34d4e8d3a1132de9b2d4707faba349116380b57f965b3e4909249
2. 0x29235c514c29c1bf4c57e3e620c2f4e596a029c5916e53e2e3f81bfbcd29da19
3. 0x8682167c080f5e64883f8ae6abb5e80bc04900d6befc71f1d801b2603f2f75c1
4. 0xc203a00a7bc090d32d7d4ab9d12ac6c073ee3209a605df309fc3ec34dedf5391
5. 0x829e29194ca3564a2e5aab640f682865d53212bcf9eb449feaa5f29aa81b5fbe
6. 0x057f23d6bc9036e983bacaadd7d2cd724780766a84565c0b2c916b59b869b6b8
7. 0x462999a9622f0d161290942978e7eebe07d8f74d40ed008b8c523493989439f9
8. 0xd71ad18326c50ae37cb94b67ba44ac2f4be8066a325dd5c3b38171b214ffa48c
9. 0xc05eb5ce75a960c54f3533d2073c1a7df2670a0752902fe88eccebc1123212aa
10. 0xd7fa137fd7aae82c376f90cb43e2e9cf874e762e0293fed3b902e8bde35cc36b
11. 0x463fef738ef71a01d4aa9ac1c6836fcf6802cdaa7de01bbe42397d79d35d8671
12. 0x4d1a020de7fc0aa076daeb62ebb904d51ac6c607b605eb63a7855f34d7b69f1b
13. 0x641fba1f23ec69d96721e34ace1926954d835b9614cb5eae215a069c056399b8
14. 0xdbe2e8dd65ea1248b2936612538f18268abd5cf27ebdab3737694571ad496004
15. 0x9f68b5e15459cb62b8c0cd4c124fa61c74147b4a5755a200fbecd21a581635d1
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae