Evidence row 292662

What was observed

{
  "count": 2,
  "tools": [
    {
      "description": "Use this when the user wants federal register search, federal register this week, or proposed rules comment deadline tracking. Query up to five watches for documents from 1994 onward, with at most 500 matches per watch and 1,500 rows, and download XLSX, ICS and CSV. Do not use for state registers or legal advice.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "date_basis": {
            "description": "Which date to search, e.g. publication (default).",
            "enum": [
              "publication",
              "comment_close",
              "effective"
            ],
            "type": "string"
          },
          "date_from": {
            "description": "First date inclusive, e.g. 2026-10-12. Defaults to six days before today for publication, today for other bases.",
            "maxLength": 10,
            "type": "string"
          },
          "date_to": {
            "description": "Last date inclusive, e.g. 2026-10-18. Defaults to today for publication, thirty days ahead for other bases.",
            "maxLength": 10,
            "type": "string"
          },
          "significant_only": {
            "description": "Limit to significant documents, e.g. false (default).",
            "type": "boolean"
          },
          "types": {
            "description": "Types: RULE, PRORULE, NOTICE, PRESDOCU; e.g. [\"RULE\",\"PRORULE\"], the default.",
            "items": {
              "description": "Document type code, e.g. PRORULE.",
              "maxLength": 20,
              "type": "string"
            },
            "maxItems": 4,
            "minItems": 1,
            "type": "array"
          },
          "watches": {
            "description": "One to five watches, e.g. [{\"label\":\"Overtime\",\"term\":\"overtime\",\"agencies\":[\"DOL\"]}]. An empty object matches the window.",
            "items": {
              "properties": {
                "agencies": {
                  "description": "Up to five agencies, e.g. [\"EPA\",\"OSHA\"].",
                  "items": {
                    "description": "Agency name, slug or abbreviation, e.g. EPA.",
                    "maxLength": 200,
                    "type": "string"
                  },
                  "maxItems": 5,
                  "type": "array"
                },
                "cfr_part": {
                  "description": "CFR part with a title, e.g. 541.",
                  "maxLength": 10,
                  "minLength": 1,
                  "pattern": "^[0-9A-Za-z.-]+$",
                  "type": "string"
                },
                "cfr_title": {
                  "description": "CFR title, e.g. 29.",
                  "maximum": 50,
                  "minimum": 1,
                  "type": "integer"
                },
                "label": {
                  "description": "Watch label, e.g. Overtime.",
                  "maxLength": 40,
                  "type": "string"
                },
                "term": {
                  "description": "Search expression, e.g. overtime.",
                  "maxLength": 200,
                  "minLength": 2,
                  "type": "string"
                }
              },
              "type": "object"
            },
            "maxItems": 5,
            "minItems": 1,
            "type": "array"
          }
        },
        "required": [
          "watches"
        ],
        "type": "object"
      },
      "name": "find_federal_register_documents"
    },
    {
      "description": "Use this when the user wants a regulatory digest, final rules effective date, or federal register comment period for known document numbers. Look up one to fifty numbers and download XLSX, ICS and CSV with published dates. Do not use for unpublished agency guidance or legal advice.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "document_numbers": {
            "description": "One to fifty numbers, e.g. [\"2026-21240\",\"2026-21253\"]. Invalid or missing numbers are reported per item.",
            "items": {
              "description": "Document number, e.g. 2026-21240.",
              "maxLength": 200,
              "type": "string"
            },
            "maxItems": 50,
            "minItems": 1,
            "type": "array"
          }
        },
        "required": [
          "document_numbers"
        ],
        "type": "object"
      },
      "name": "show_federal_register_documents"
    }
  ]
}

What the leaf hashes

{"body":"e9ead279b8fc0cadc7732fba42ac58b4a00ecdb180ace72aef4235e4b3d1b82c","id":292662,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793048899919658,"prev":null,"subject":"cd1fbfbe-8d6c-4d86-b23a-91058976e15a","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. 0x788a848f95eb8343cefed82d5064cae5acb0d9b18f8c7eb30906fc516491cfea
2. 0xa0fbb21a0798f320b6207ef5a5ca0b14186ac2f0413907d9dd052260a91190e6
3. 0xe407472b2fb9255f0cdf7769d40788116e9014f62b84f2b27cef731c23db9274
4. 0x2123077619fae3e86f0eaadb1589a11a94a85b06b638c911de4322987c6798f9
5. 0x7c63a8c6f8490e147bf69ffcc86227c3f16e94db985054991da266624cc6fcda
6. 0x614a2c96ef760e6a5fa15f9ee9c10f4ba952ebc7f16bb95d8c5056976fa58535
7. 0x25cb50c7aa807c6f7b6d3c7980aec1b3a993a7b983f59e91399b7bcc16555437
8. 0x887f3b6beb6443ee17970ef3dbd8f1914a8813629e96603e83594207d9339301
9. 0x8c3308a220839d70ff81d3818f196f48199a938de2ee9fc9f5f38c8bbab658e1
10. 0x82de673d7b0aea740891d4dba7c3425d4070f8237d8c7357e6034c5ccc9ee734
11. 0x15ee99441401ec9e8c72aaf51bd6c821ec4e6b18bc91225370e5c19c4c8e8448
12. 0xdcba35a3346e9c4b9ae1267cc5995998c2c33da9ef658e955eaae1589ebbdcad
13. 0x01c95624b1f2385ef774ee258a9ae58a4df07a1bdaa829de84e1d5201f3f39c2
14. 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae