Evidence row 1251309

What was observed

{
  "count": 1,
  "tools": [
    {
      "description": "Use this when the user wants a flashcard maker for supplied question-answer pairs: flip cards interactively, track review progress, print paired cut-out cards as an A4 or Letter PDF, or export an Anki-style Front/Back CSV. Removes identical pairs. Does not generate learning content, check facts, provide spaced repetition, or sync progress. PDF prints Latin with accents, Greek, Cyrillic and Vietnamese; scripts its font lacks (CJK, Arabic, Hebrew, Thai, Indic, emoji) show as [?]; widget and CSV preserve Unicode. Up to 24 cards and a 2,800-byte payload.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "cards": {
            "description": "Explicit question-answer pairs supplied by the user, e.g. [{question:\"hello\",answer:\"hola\"}]. Do not invent answers.",
            "items": {
              "properties": {
                "answer": {
                  "description": "Supplied back text, e.g. hola.",
                  "maxLength": 240,
                  "type": "string"
                },
                "question": {
                  "description": "Supplied front text, e.g. hello.",
                  "maxLength": 150,
                  "type": "string"
                }
              },
              "required": [
                "question",
                "answer"
              ],
              "type": "object"
            },
            "maxItems": 24,
            "minItems": 1,
            "type": "array"
          },
          "paper": {
            "description": "PDF paper size, e.g. A4 (default) or Letter.",
            "enum": [
              "A4",
              "Letter"
            ],
            "type": "string"
          },
          "title": {
            "description": "Optional deck title, e.g. Spanish greetings.",
            "maxLength": 70,
            "type": "string"
          }
        },
        "required": [
          "cards"
        ],
        "type": "object"
      },
      "name": "generate_flashcard_deck"
    }
  ]
}

What the leaf hashes

{"body":"fca87b0b3e5cd7f50b383590cf6c743ca96a51905b723e63c788bf852688dc72","id":1251309,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793367266619863,"prev":292555,"subject":"3147a2a8-da17-45b0-95f3-a0272ccb4b06","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-30 (243099 rows).

1. 0x774437ddc0d74582fe05af078d9d7ed9701e201c5b25d938dbc179caaf4817af
2. 0xdc550e6074d6cad77aef474bc433a935fa7a8fef865095d4bfe0d86566189b12
3. 0xf14808175025d59eadcf06e38995c4053ec4d061bf73861bc152d25fa87ecdf8
4. 0x92a84981386866065b1ea7128d528fc4c5f906690e49248a5977ea88cf733884
5. 0x95798c17f52271a03837be9cf73b924591361f75b16d7225986ccf5d3a4eaf98
6. 0x7a50e18795a150a65d7c7c60c0d27380e423ece18a0d6af7c1d2585c07538973
7. 0xa7a9f8ba7d98b2c5d52a242544c723745aecc42889c3a0c245ea21f5c20eed00
8. 0xbf5c02a19a77d3c9a486ccd20f287290b3a397c9124df244378e4951c6e8ca43
9. 0x95d1048a803f9ca0b7a4283bc2d8b76f1205bb12ea161f07cf04bd9d8b339955
10. 0x059df6dc481ad8375245178eb41811159bb3c8dbbcfc1ca5a745fd0d1f7e4de4
11. 0x5f2108a18036c397c1b66575525e1ffcda4a8e76e098ca6f1a533303267381c4
12. 0xf3f40fe498675360f57a43c0bd787d90a1f1734ae0e4763208da630024b06bcd
13. 0x630c92ab7a09a852e8f8d699227d5d4a4acf303f63bea031f0057a3a36087420
14. 0x75bcbdd2a0d7acdea21f6011126339c8e33a476ec0a76842480cf5bf70db6a72
15. 0xdf25f5d38e3fb54d3e66e3bf876db529f619041e0d21f0bc35b80003418e3d9c
16. 0xdbaaffa44665d1fa60d33d2c4075bd87629b76d01a6ee63e621e78590303b56d
17. 0xffe660edb9e5c6e3449a49454634c3e7b2f9fe703e5697f723b021735647ab7e
18. 0x30a81d8fcef4e8f9e2877c62796cfc5612fc1b251127d531dee28f8dbd5c5147

Day root

0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875

Chained

0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822

Published

On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861