Evidence row 313002

What was observed

{
  "count": 7,
  "tools": [
    {
      "description": "Two UK areas of the same level side by side on the same published figures, each with its own period and source. Key figures by default.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "a": {
            "description": "An official area code (E09000012), a page slug (hackney) or path, or an exact place name.",
            "type": "string"
          },
          "b": {
            "description": "An official area code (E09000012), a page slug (hackney) or path, or an exact place name.",
            "type": "string"
          },
          "layers": {
            "description": "Optional layer ids to compare.",
            "items": {
              "type": "string"
            },
            "maxItems": 8,
            "type": "array"
          }
        },
        "required": [
          "a",
          "b"
        ],
        "type": "object"
      },
      "name": "compare_places"
    },
    {
      "description": "Read one UK area's overview figures by its canonical page path. Includes periods, sources, licences, gaps and citation links at the published level of detail.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "id": {
            "type": "string"
          }
        },
        "required": [
          "id"
        ],
        "type": "object"
      },
      "name": "fetch"
    },
    {
      "description": "Published figures for one UK area: key figures by default, or every figure in one topic. Each figure has its period, publication date, rank, comparisons, source and a link to the figure on its page.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "place": {
            "description": "An official area code (E09000012), a page slug (hackney) or path, or an exact place name.",
            "type": "string"
          },
          "topic": {
            "description": "Every figure in this topic, with gaps and their reasons.",
            "enum": [
              "housing",
              "crime",
              "people",
              "deprivation",
              "health",
              "education",
              "environment",
              "transport",
              "connectivity",
              "planning",
              "economy",
              "council-tax",
              "elections",
              "services"
            ],
            "type": "string"
          }
        },
        "required": [
          "place"
        ],
        "type": "object"
      },
      "name": "get_place"
    },
    {
      "description": "Councils ranked on one measure across the UK, a nation or an English region, for the latest period. Measures each nation makes its own way (such as deprivation) are ranked within one nation only.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "layer": {
            "description": "A layer id or slug, such as house-price-average or house-prices.",
            "type": "string"
          },
          "limit": {
            "default": 10,
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "order": {
            "default": "highest",
            "enum": [
              "highest",
              "lowest"
            ],
            "type": "string"
          },
          "place": {
            "description": "Optional: also say where this council sits.",
            "type": "string"
          },
          "scope": {
            "description": "uk, a nation (england, wales, scotland, northern-ireland) or an English region (london, north-west...). Default uk.",
            "type": "string"
          }
        },
        "required": [
          "layer"
        ],
        "type": "object"
      },
      "name": "get_ranking"
    },
    {
      "description": "The areas a Great Britain postcode sits in (council, constituency, ward, neighbourhood and more) with their codes and pages. A district (E8) or sector (E8 1) gives its councils. Northern Ireland postcodes are not available.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "postcode": {
            "description": "A full postcode (E8 1AA), sector (E8 1) or district (E8).",
            "maxLength": 12,
            "type": "string"
          }
        },
        "required": [
          "postcode"
        ],
        "type": "object"
      },
      "name": "lookup_postcode"
    },
    {
      "description": "Find UK area overview documents by place name for research, with canonical page paths, titles and citation URLs. Great Britain postcodes identify their published area. No Northern Ireland postcodes.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "query": {
            "maxLength": 100,
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "search"
    },
    {
      "description": "Find UK places (nations, regions, councils, constituencies, towns, wards, neighbourhoods) and postcodes by name, with each one's official code, level and page URL. Also lists matching data layers.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "limit": {
            "default": 8,
            "maximum": 20,
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "description": "A place name, postcode or district, such as Dalston, Leeds or E8.",
            "maxLength": 100,
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "search_places"
    }
  ]
}

What the leaf hashes

{"body":"3553e53416249cee119ab4c05fde8532b18d3bf5e9083ab8784edc2b517e2d96","id":313002,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793059361797269,"prev":null,"subject":"b4c1ed5e-3ede-403f-93ff-71209a49d290","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. 0x55058468104e35d8cbdfe92afa534399445a4509d67811967d87d4b16be1e9b8
2. 0x5a73ec28514f073312b1563d64a1ab4012deea87bc061daff75547551874f801
3. 0xf35a1a66b300e4bd67701f87e4a39375fcc563f685d4fd4f6379ffc465bcd5d1
4. 0x3481bbb9ec88210c99a501ee84f7cc79b0102263e93ebd1af13d92de8bab7e70
5. 0x431a4a1eb1298b212a188c1757f045d0b4b324f23d0b8c7a7f2614d8c452e4f5
6. 0x441576fd2916319ea65431043e310a10f88ba38f29a95b048081f37f4f2a0238
7. 0x88a85835e1a15e0dbc7c48dd2c947625b8644bbc65a09e92025107c299582177
8. 0x7ff638296431f02953aca4c95a5a90b89bfee46498ef711c05ca8bf0b629c2e8
9. 0xda198db72537d68fec460dc6b47b031eb67d465d7664b038488d30b129328eb2
10. 0x33d862eff42ff21c3c9bea8828946753fa2886cf75d3dc17d410ea3c6699b4e2
11. 0x70cbb36b38089bd590d59988369200459112eeb685a3d047dc7d6f85d72f0b65
12. 0xbda8a72c454627630518fefedac1e595455f868382eb4add82d53de75ccbae18
13. 0x906b5f0e8ef1fe7894886d84f460bb3239d5f14b14ad4adff27c7dcea6265169
14. 0x674bc1173d39130be4d15bbfc7327f8a8af87eb251e54c8d4409c7e840b9e538
15. 0xb78ea6a255dd06e2f402a1a733bca392fa6243920bcba95e8b80bdfc6ce5f553
16. 0x3ed50f053eca72dfd3a9d45a11935240bfe691e57835c367ddebe2cbc49efe9d
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4