Evidence row 573111

What was observed

{
  "count": 6,
  "tools": [
    {
      "description": "Finds words in the lists that start with, end with or contain a letter pattern, for example 'sh', 'ck', '-ight' or 'ai'. Returns each match with its list, grade range and page. Case-insensitive.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "contains": {
            "maxLength": 12,
            "minLength": 1,
            "type": "string"
          },
          "ends_with": {
            "maxLength": 12,
            "minLength": 1,
            "type": "string"
          },
          "grade": {
            "description": "Only English lists covering this grade.",
            "enum": [
              "pre-k",
              "kindergarten",
              "grade-1",
              "grade-2",
              "grade-3"
            ],
            "type": "string"
          },
          "language": {
            "enum": [
              "en",
              "de",
              "es",
              "fr",
              "nl",
              "pt-br"
            ],
            "type": "string"
          },
          "limit": {
            "description": "Default 60.",
            "maximum": 500,
            "minimum": 1,
            "type": "integer"
          },
          "starts_with": {
            "maxLength": 12,
            "minLength": 1,
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "find_words"
    },
    {
      "description": "License (CC BY 4.0 for the compilation; the Dolch words are public domain), the citation text and the CSV and JSON download addresses.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "get_citation"
    },
    {
      "description": "Explains the source of each grade placement: Dolch's own grade levels (1936, public domain), the Common Core Foundational Skills item that names the skill, or a typical sequence when no standard names it. Includes the limits.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "get_placement_basis"
    },
    {
      "description": "The full list: every word, its groups (for example -at, -an, -ap families), the grade range, the placement basis, the page URL and the license. Use an id from list_word_lists, e.g. short-a, kindergarten, sh.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "id": {
            "description": "List id, e.g. short-a, kindergarten, vowel-teams, or es:palabras-con-m",
            "type": "string"
          }
        },
        "required": [
          "id"
        ],
        "type": "object"
      },
      "name": "get_word_list"
    },
    {
      "description": "Every different English word from the lists that cover a grade, deduplicated, with the lists each word comes from. Optional section filter (for example only sight words or only cvc). A grade is a typical guide, not a rule: programs and standards differ, and it is not an assessment of any child. English lists are placed by grade; lists in other languages follow each language's own curriculum and have no grade.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "grade": {
            "description": "pre-k, kindergarten, grade-1, grade-2 or grade-3",
            "enum": [
              "pre-k",
              "kindergarten",
              "grade-1",
              "grade-2",
              "grade-3"
            ],
            "type": "string"
          },
          "limit": {
            "description": "Maximum words to return. Default 300.",
            "maximum": 1500,
            "minimum": 1,
            "type": "integer"
          },
          "section": {
            "enum": [
              "cvc",
              "families",
              "sight",
              "digraphs",
              "patterns",
              "wordlist"
            ],
            "type": "string"
          }
        },
        "required": [
          "grade"
        ],
        "type": "object"
      },
      "name": "get_words_for_grade"
    },
    {
      "description": "Lists the available word lists with id, title, language, section, grade range, the source of the grade placement and word count. Filter by language, grade (English lists whose grade range includes it) or section. A grade is a typical guide, not a rule: programs and standards differ, and it is not an assessment of any child. English lists are placed by grade; lists in other languages follow each language's own curriculum and have no grade.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "grade": {
            "description": "English lists that cover this grade.",
            "enum": [
              "pre-k",
              "kindergarten",
              "grade-1",
              "grade-2",
              "grade-3"
            ],
            "type": "string"
          },
          "language": {
            "description": "en, de, es, fr, nl or pt-br. Omit for all.",
            "enum": [
              "en",
              "de",
              "es",
              "fr",
              "nl",
              "pt-br"
            ],
            "type": "string"
          },
          "section": {
            "description": "cvc, families, sight, digraphs, patterns or wordlist (other languages).",
            "enum": [
              "cvc",
              "families",
              "sight",
              "digraphs",
              "patterns",
              "wordlist"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "list_word_lists"
    }
  ]
}

What the leaf hashes

{"body":"8934a14e859adf742c316199aa3fd46bc9c9318555428a4050305537cd8765b4","id":573111,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793140953655576,"prev":null,"subject":"3716443a-8e7d-4950-92ab-f8e171902322","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. 0xd27e4c4795ba840e0a2edd1ab97eceb5fecef488df5aeeab0c031fecc8bfd493
2. 0xdf249f20936cdcb316bc055a4a094a090b45129a7c6506f1c685433a0d838b17
3. 0x55c860195ac94706efd60ebbfeec0dd8b9bbaba573e309c8a2c230b2f81883da
4. 0xc25bf526ba423c7da7c49a6070274473b2da748a0b98039caaee49833cab8dae
5. 0x7dbbbeab997c803f5c174bd9c8a724ec65f17d3119ff5e30ecd1c3644704713c
6. 0x73067a0bf9105e217d4486d3c3f93c5979141fb22801b76a7a0912e08ff66f58
7. 0x48b69e111bd93d9c4c747613f13b61c68c73be5c1cd28ae8cb3cd8408c954451
8. 0xf7ab174e06418cc9bd2e9217a703f306b8bd13d700f9f60fa0057a053702ca4f
9. 0x6a0565ba2959414e9b67501ea93ad19dd12d1ba32108afd5fafba38aff3a5347
10. 0x63fab591f55ad00bc0e680f7d7ae749a4bf51899db148b9197a165bd355e1eb9
11. 0x621d4dbcfb70ab294046951fe2837a8b39f75c67fac3f911dfa479f7fb2b5b53
12. 0x171aeb7198e4c29bd794c75ee3b02f70c21f3caa4365d2b304c00b891f1bbc94
13. 0xc66f83a1320fe7c1faf22674eeeb7fae22ecd2f0b102d9619a484291f2ce104a
14. 0x8f676edfb4faaa290229d8f4f69ab721fc627424463d62f5146b3d1ca7f2f0c6
15. 0x969cd44e5a4e8dc3110540398fbf689659eb51df735c1cda5d8f021ef9ff5683
16. 0xa94627de1af0e823832e05a9069b304ecccb8c0cdb8f9cfc4f2039bfb9799dc5
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4