Evidence row 291527

What was observed

{
  "count": 7,
  "tools": [
    {
      "description": "Get current BART service advisories, delays, and elevator/escalator status.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "bart_advisories"
    },
    {
      "description": "Get real-time departures from a BART station.\n\nArgs:\n  - station: 4-letter abbreviation (e.g. EMBR, 24TH)\n  - direction: Optional 'n' or 's'",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "direction": {
            "description": "Direction filter",
            "enum": [
              "n",
              "s"
            ],
            "type": "string"
          },
          "station": {
            "description": "Station code (e.g. EMBR, 24TH)",
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "station"
        ],
        "type": "object"
      },
      "name": "bart_departures"
    },
    {
      "description": "Get fare between two BART stations.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "destination": {
            "description": "Destination station code",
            "minLength": 1,
            "type": "string"
          },
          "origin": {
            "description": "Origin station code",
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "origin",
          "destination"
        ],
        "type": "object"
      },
      "name": "bart_fare"
    },
    {
      "description": "Search BART stations by name, city, address, or 4-letter station code.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "city": {
            "description": "Optional city filter",
            "type": "string"
          },
          "limit": {
            "default": 10,
            "description": "Maximum matches to return",
            "maximum": 25,
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "description": "Station name, city, address fragment, or code, e.g. Embarcadero, Oakland, EMBR",
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "bart_station_lookup"
    },
    {
      "description": "List all BART stations with abbreviation codes and locations. Use this to look up station codes needed by other tools.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "bart_stations"
    },
    {
      "description": "Summarize current BART service status from advisories and real-time alert data.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "bart_status_summary"
    },
    {
      "description": "Plan a trip between two BART stations. Returns schedule, fares, and transfer info.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "date": {
            "description": "Date MM/DD/YYYY",
            "type": "string"
          },
          "destination": {
            "description": "Destination station code",
            "minLength": 1,
            "type": "string"
          },
          "origin": {
            "description": "Origin station code",
            "minLength": 1,
            "type": "string"
          },
          "time": {
            "description": "Departure time e.g. '5:30pm'",
            "type": "string"
          }
        },
        "required": [
          "origin",
          "destination"
        ],
        "type": "object"
      },
      "name": "bart_trip"
    }
  ]
}

What the leaf hashes

{"body":"812030e1db278765f536b709df18c936a0fd778a0feffb9792b8d625034dd37b","id":291527,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793048145311881,"prev":null,"subject":"e0efbe1f-f893-4e29-802b-5322c6cf719e","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. 0xe3cd3580a82e9111bed3f27f57f02ad0ff3529c3ea343c43b5697791448a6598
2. 0x4cbc7d3278ea6d88886dc97701f17a16532060cb7a5e31645ff5d7eeb80c5d22
3. 0xb323b64c4ed7a89ab7e60941af7e3878a801117b3111e70f6efecb654783394b
4. 0x9557049db92c0adbb24b2c770bf4fa526e5a14e7aebaca5a3447949858b056a2
5. 0x04a540c57a31b71ad3f7fed8a410881f3f71756805d6ede815e0c442597686dc
6. 0xf4407be5fee29da157193571f096d9342ac72ab7b32d161c235c07747a5e2954
7. 0xca65cf5e2bf625b0bfbe3b1263154c28e15409056d5363eb1eb1919f2172bf98
8. 0x82cb7de08cccb3fba0e26dc2b828f3596faaec3c2ecb649a7a3ad72617f1081b
9. 0x5d55b33bd58a0ad2780c5672ea48198907b20ad50ef1642d2ded48f99c30f942
10. 0x249b79bed19d1f9d60c6d935894d3c7f842961834c52c966852cddf05d69629d
11. 0xb545b804be0d2933a674be6ac915c6c6235897d0274e66143aa7cf879b9d86a3
12. 0x8e135936797442c4eea61915f2c9f8f6df06e1322204cd0e6986ada3e54c77cc
13. 0xc0924a0807e534382f518663123231c317124338831a2b310de2c17b09677086
14. 0x9bc5fc98278b9f6dc18c66c6e162aefd5244be03170d41bc5161f58ad11beed7
15. 0x95657a7d540ed6cac0bde9995782333b2562a9a6641853269ac95148827410f0
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae