Evidence row 1286704

What was observed

{
  "count": 6,
  "tools": [
    {
      "description": "Check the user's answer to a question from get_practice_questions. Use it when the user answers one of those questions. `selected` is the option letters the user chose, e.g. [\"B\"] or [\"A\", \"D\"]. Returns whether it is right, the correct letters and the explanation.",
      "inputSchema": {
        "properties": {
          "exam": {
            "title": "Exam",
            "type": "string"
          },
          "question_id": {
            "title": "Question Id",
            "type": "string"
          },
          "selected": {
            "items": {
              "type": "string"
            },
            "title": "Selected",
            "type": "array"
          }
        },
        "required": [
          "exam",
          "question_id",
          "selected"
        ],
        "title": "check_answerArguments",
        "type": "object"
      },
      "name": "check_answer"
    },
    {
      "description": "Describe one exam: the vendor's real exam (official code, question count, fee, domains and their weights) and our practice set for it (size, free questions, price, timed mock exam). `exam` is a set_id from search_exams or an official exam code. Use it when the user asks about an exam's format, length, fee or domains, or about our practice set for it.",
      "inputSchema": {
        "properties": {
          "exam": {
            "title": "Exam",
            "type": "string"
          }
        },
        "required": [
          "exam"
        ],
        "title": "get_exam_detailsArguments",
        "type": "object"
      },
      "name": "get_exam_details"
    },
    {
      "description": "Return up to five free sample multiple-choice questions for one certification exam, each with its correct option letters and a written explanation. Use it when the user wants to practise, be quizzed or test themselves on an exam this server covers. `exam` is a set_id from search_exams or an official exam code such as \"SAA-C03\".",
      "inputSchema": {
        "properties": {
          "count": {
            "default": 5,
            "title": "Count",
            "type": "integer"
          },
          "exam": {
            "title": "Exam",
            "type": "string"
          }
        },
        "required": [
          "exam"
        ],
        "title": "get_practice_questionsArguments",
        "type": "object"
      },
      "name": "get_practice_questions"
    },
    {
      "description": "Recommended exam order for each career role at one vendor (e.g. \"aws\", \"Microsoft Azure\"), from first exam to last. Use it when the user asks which exam to take first, or in what order, for a role.",
      "inputSchema": {
        "properties": {
          "vendor": {
            "title": "Vendor",
            "type": "string"
          }
        },
        "required": [
          "vendor"
        ],
        "title": "get_study_pathsArguments",
        "type": "object"
      },
      "name": "get_study_paths"
    },
    {
      "description": "Without a vendor, list the certification vendors covered and how many exams each has. With a vendor (a name such as \"Microsoft Azure\" or a code such as \"aws\", \"iapp\", \"isc2\"), list that vendor's exams. Use it when the user asks which vendors or exams are covered.",
      "inputSchema": {
        "properties": {
          "vendor": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "title": "Vendor"
          }
        },
        "title": "list_examsArguments",
        "type": "object"
      },
      "name": "list_exams"
    },
    {
      "description": "Find certification exams by official code (e.g. \"SAA-C03\", \"CIPP/E\"), name (e.g. \"Azure Administrator\") or topic (e.g. \"GDPR\"). Returns the matching practice sets with their size, free questions and price. Use it when the user names an exam or certification, to see whether it is covered and get its set_id.",
      "inputSchema": {
        "properties": {
          "limit": {
            "default": 5,
            "title": "Limit",
            "type": "integer"
          },
          "query": {
            "title": "Query",
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "title": "search_exams_toolArguments",
        "type": "object"
      },
      "name": "search_exams"
    }
  ]
}

What the leaf hashes

{"body":"fb79f2da092de1256529fddde2f121332c18742b6708b2d2c91503677366ca2a","id":1286704,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793388130313338,"prev":1233452,"subject":"dc96a6c1-b0d4-40bb-bfbb-8efdfb3ab1ce","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. 0xe2f034276a15988bc69376694d6c4d17a7e4f693a53388827edb06f6de92d9fd
2. 0xf217569f6eca4635c1ec644f8da2a3918cb12b750511fb6569985339ffc6fa3c
3. 0xbcfad06d59095254baca56e3bb1a3bdf75d16458149f65b854567a7c354aa96f
4. 0x25a55b403c25a1978fed174ea6ad7c5b44215093b5e12e4f6a212b6eca47248b
5. 0x4a003d0c40480ef34bdab770b5ab08280ae05226bd82827ebba0194d8d3146bd
6. 0x9423d9fc96017de092b58e476d09cf7022e12332dac6f9747a36d7a6d61716b0
7. 0x2116c3c34e538b6b90f1d2566583dc816b7cd6f81e1a7a7dc2a856f96c2be606
8. 0x4abe63374511d420ef34bcb1dce822c77447e3c0be3ba4bac04580845f7cc8e6
9. 0x45b9f3ff3e5f921ed3b5844d80d2cee9623f002def2c30d42f98db2c9c40b4f7
10. 0x53d3b8b8b2d0d5dac635bace0cc035430c244016d564a214a0e656fc339a835f
11. 0x2d2ced9990c4e18b72df0178a834aee6cd1072ea08f6bf066adbca227160501f
12. 0x29d78c08f0f7705f8a1cebe8b65a9bc2be71cf8d471fab735b33a8720bcdf0cb
13. 0xc1648b63331523f1ffba0502dc2754123aa7191c2d0b487849b227a545fbee34
14. 0x3a7a0fa82cbf8d3f1546fc6f89c9a5f35e025db7170b70e3f2dcd72b4ebb0f8e
15. 0xea7df1002501052c124b5aed2b1a5df3d59be54394c6a8539c86fad1df339a9e
16. 0xfbe61dc2d59668ac573e5eab865747e21d38bf2fe4c64762beef01f1018a4dea
17. 0x71e74c274b23c9047354edb6dcd2c654415e3986b8bd875dae992996ea12e22b
18. 0x0c43c73b62a5d49ee1444b5dc4195fc5b16b141d3f4458e2e9fbd5fd6ecb367d

Day root

0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875

Chained

0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822

Published

On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861