Evidence row 514496

What was observed

{
  "count": 5,
  "tools": [
    {
      "description": "For a home postcode, list nearby state schools with the straight-line distance from the postcode centre, the last distance offered in each of the last three years (council allocation figures) and a reading of the chances: Likely at 80% of the last distance or less, Possible up to 110%, Stretch beyond it. Faith and selective schools are capped at Possible because other rules decide places.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "limit": {
            "default": 10,
            "maximum": 20,
            "minimum": 1,
            "type": "integer"
          },
          "phase": {
            "enum": [
              "primary",
              "secondary"
            ],
            "type": "string"
          },
          "postcode": {
            "description": "A full UK postcode (e.g. \"KT10 8PQ\") or an outcode (e.g. \"KT10\").",
            "type": "string"
          },
          "radius_km": {
            "description": "Search radius. Default 2 km for primary, 5 km for secondary.",
            "maximum": 10,
            "minimum": 0.5,
            "type": "number"
          }
        },
        "required": [
          "postcode",
          "phase"
        ],
        "type": "object"
      },
      "name": "check_catchment_chances"
    },
    {
      "description": "Rank neighbourhoods within commuting reach of a workplace for a house-buying budget, by how realistic a place at a good state school is (council cut-offs and results), with sold-price medians from HM Land Registry. Commute reach is estimated from distance.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "budget": {
            "description": "Purchase budget in pounds.",
            "maximum": 10000000,
            "minimum": 100000,
            "type": "integer"
          },
          "commute_mode": {
            "default": "transit",
            "enum": [
              "transit",
              "drive",
              "cycle",
              "walk"
            ],
            "type": "string"
          },
          "include_grammar_schools": {
            "default": false,
            "description": "Secondary only: count grammar schools (entry by the 11+).",
            "type": "boolean"
          },
          "max_commute_minutes": {
            "default": 60,
            "maximum": 90,
            "minimum": 15,
            "type": "integer"
          },
          "min_bedrooms": {
            "default": 0,
            "enum": [
              0,
              2,
              3,
              4,
              5
            ],
            "type": "integer"
          },
          "phase": {
            "enum": [
              "primary",
              "secondary"
            ],
            "type": "string"
          },
          "workplace_postcode": {
            "description": "Full UK postcode of the place of work.",
            "type": "string"
          }
        },
        "required": [
          "workplace_postcode",
          "budget",
          "phase"
        ],
        "type": "object"
      },
      "name": "find_areas_for_schools"
    },
    {
      "description": "Full profile of one school by URN: Ofsted, the newest GCSE, KS2 and A-level results, university destinations (Oxford and Cambridge, Russell Group) and the last distance offered for each of the last three years with applications per place.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "urn": {
            "description": "The school's URN (its six-digit unique reference number).",
            "maximum": 999999,
            "minimum": 100000,
            "type": "integer"
          }
        },
        "required": [
          "urn"
        ],
        "type": "object"
      },
      "name": "get_school"
    },
    {
      "description": "League tables of schools in England, optionally for one council: attainment8 or progress8 (GCSE), a_level (points per entry), ks2 (primary, % meeting the expected standard), oxbridge or russell_group (share of sixth-form leavers, pooled over five cohorts).",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "council": {
            "description": "Council (local authority) name, e.g. \"Surrey\" or \"Barnet\".",
            "type": "string"
          },
          "limit": {
            "default": 10,
            "maximum": 25,
            "minimum": 1,
            "type": "integer"
          },
          "measure": {
            "enum": [
              "attainment8",
              "progress8",
              "a_level",
              "ks2",
              "oxbridge",
              "russell_group"
            ],
            "type": "string"
          }
        },
        "required": [
          "measure"
        ],
        "type": "object"
      },
      "name": "school_rankings"
    },
    {
      "description": "Find schools in England by name, town, council or postcode. A postcode returns schools within 5 km, nearest first. Each result has its URN, Ofsted grade, headline results and a link to its MySchoolHub page.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "limit": {
            "default": 10,
            "maximum": 20,
            "minimum": 1,
            "type": "integer"
          },
          "phase": {
            "description": "Only primary or only secondary schools.",
            "enum": [
              "primary",
              "secondary"
            ],
            "type": "string"
          },
          "query": {
            "description": "School name, town, council or postcode, e.g. \"Tiffin\", \"Guildford\" or \"KT10 8PQ\".",
            "minLength": 2,
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "search_schools"
    }
  ]
}

What the leaf hashes

{"body":"f7b2ec3f9d4ad3f161826a7a73928bf8d4747da0a3e1c3ce23d3b4755466a2b8","id":514496,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793119591368795,"prev":null,"subject":"0801f9ec-ed36-437f-b0ad-8a69401e5c04","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. 0xfa95c9d8cd849409fcbf1840cadd4737747ad895c69096800f8f94a3bdef3fcc
2. 0xc4bdd8094ce5275dde7d52eb20c8331ed4085071e138b49c6e42643a29cb2a0c
3. 0x91c04ed52a01d7b9ab0354fab00078c77254bf7a90f9b0fa77158b349a03f82c
4. 0x80752980bce6b5028495f5b8e09046a55cda81f6e240aeb3bca38de09d491d1d
5. 0x110408c948fdfb536ea8ee0e90ac73862b08de18c26202737b3691ab75fb408c
6. 0x72ecc51cbdca367fd735eff7782a4c4a0f1212a1cd45f5bf7ebd530cd7cb844c
7. 0x6297d6abbb9eeea10d27d1517a2fab641bbebfd296d81b6b9193afc34d50ebbd
8. 0x5d7b134948de09f789c988029083020c212461fa69bda7034c9e9421c36826d5
9. 0x0c7d87d8458c0161ff93657d4ca3286848354a3c348a350cd574869dee08aeb2
10. 0x82bd9a19670fcfd1ff1b7df4edcd0ac42b8ef93fcf84ed1e26d9d7bdf8d47485
11. 0xb79afe573322beeaf10115333840af7581c0f1a3d89119e0bbb5881311429394
12. 0x58215df828d47943a710362ab6e17ad0eb4a7c42a13dbec3ab2635d1abf3945f
13. 0xf24b37f8ac293f5328e3e6b28cf868989fe99debf025c153c0d9a1698e846e25
14. 0x94d3785ce9330e4580bccada5459380aa2aac76a0bf11354d1353b375afc17d2
15. 0xb5b652bba4a5afca56c21031d89b1c06361563aaf54ccc8541c296ceeb2b66fa

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4