Evidence row 563167

What was observed

{
  "count": 7,
  "tools": [
    {
      "description": "The columns, which of them are numeric, the row count and the provenance banner of the Walkvo dataset. Call this first to learn the schema.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "dataset_columns"
    },
    {
      "description": "The rows of the Walkvo dataset whose column is any of the given values, in the order given — for \"X vs Y\" questions.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "column": {
            "minLength": 1,
            "type": "string"
          },
          "values": {
            "items": {
              "minLength": 1,
              "type": "string"
            },
            "maxItems": 10,
            "minItems": 2,
            "type": "array"
          }
        },
        "required": [
          "column",
          "values"
        ],
        "type": "object"
      },
      "name": "dataset_compare"
    },
    {
      "description": "The source, the date it was computed, the licence and the citation for the Walkvo dataset. Read this to attribute a figure correctly.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "dataset_provenance"
    },
    {
      "description": "The rows of the Walkvo dataset where a column equals a value exactly (case-insensitive).",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "column": {
            "minLength": 1,
            "type": "string"
          },
          "value": {
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "column",
          "value"
        ],
        "type": "object"
      },
      "name": "dataset_row"
    },
    {
      "description": "Rows of the Walkvo dataset whose cells contain the query (case-insensitive), up to 50.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "limit": {
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "description": "text to look for in any cell",
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "dataset_search"
    },
    {
      "description": "count, min, max, mean, median and sum of a numeric column of the Walkvo dataset (grouping commas and currency are handled; non-numeric rows are excluded and counted).",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "column": {
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "column"
        ],
        "type": "object"
      },
      "name": "dataset_stats"
    },
    {
      "description": "The highest (or lowest) rows of the Walkvo dataset by a numeric column — \"which is the most/least X\".",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "ascending": {
            "description": "true for the lowest first; default highest first",
            "type": "boolean"
          },
          "column": {
            "minLength": 1,
            "type": "string"
          },
          "limit": {
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          }
        },
        "required": [
          "column"
        ],
        "type": "object"
      },
      "name": "dataset_top"
    }
  ]
}

What the leaf hashes

{"body":"ecae9dc98df099e8b57036bed167712bd5c06c6d9c2e3e23a9ddc6a811e791cd","id":563167,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793137615902095,"prev":null,"subject":"1aba66d5-84f1-4e45-a58a-0fd254ce4efc","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. 0xdfcf3e233a3382ff622bbffcb9f47e1464a6a640ee776229faf5b19aadefef68
2. 0x6b9418bfed3989e8560ffc7440d685d4d1588e5d80ceb97f464c740295ffad13
3. 0xa5993052289b91a2a501264c8d914f90af239ee4bcccf8c7c4ae9813e6fbdfe1
4. 0x6d22446dc6c13b47642def942b2439028b48106835b78cc56d25a108fd3db739
5. 0xe9c63d9a1547a9e3a333224d2eb960a9dec868c260f87ccb16cf8bd97568b1c5
6. 0x0280362246516d33915dc57396ec83cbd246203af4c271a0bd7817343660be8a
7. 0x7f5a6acdfb644d295ec59b69fe78ab1887d5abc56bc8f2f3d21f0df210b2f6b1
8. 0xaf7b573263e78f43fd3b3d1928c3e7710932c1618c9e6644eb47773134ce4f26
9. 0x82c91994046fdeb6842bcd11f43df8905129aa39a9d98c4b04271844c3f52a68
10. 0xf15c4662f158512752b5663d4c94f9e3c5d11789dc4388192e7e6d9c657a39ab
11. 0x9af01ba97e34591efa38acdf7cbe8b47ad3b56f8797520a2c7b8cc01c4c26ae7
12. 0x432466fcdd2910b1cfb374f6f8307f56042f761290246a54c4573b208b574ac2
13. 0x979156f4f0a1ab811055c0a4d2b45bfa74d4bef619c176540454ee8d15e5bebc
14. 0xf72dee7a0c7534cb19ede4959b957b00c0a8285c36ad49dd2ce1c1092bf60d93
15. 0x24e3e2bb8ee1e8d20756de35f0e0c4ec8eb1f193bd2cf3f077ee1f92f211c34d
16. 0x8745bd887f5ce9f7a49558fd2b04cdcd97a05ea9f8a23f62d0e80cb13d328b0f
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4