Evidence row 294139

What was observed

{
  "count": 6,
  "tools": [
    {
      "description": "Calculate Internal Rate of Return (IRR) for cashflows.\n    cashflows: [initial_investment (negative), cf1, cf2, ...] Returns: {irr_percent}",
      "inputSchema": {
        "properties": {
          "cashflows": {
            "items": {},
            "title": "Cashflows",
            "type": "array"
          },
          "guess": {
            "default": 0.1,
            "title": "Guess",
            "type": "number"
          }
        },
        "required": [
          "cashflows"
        ],
        "title": "calculate_irrArguments",
        "type": "object"
      },
      "name": "calculate_irr"
    },
    {
      "description": "Calculate Net Present Value. rate: discount rate as decimal (e.g. 0.1 = 10%).\n    Returns: {npv, rate_percent, cashflows_count}",
      "inputSchema": {
        "properties": {
          "cashflows": {
            "items": {},
            "title": "Cashflows",
            "type": "array"
          },
          "rate": {
            "title": "Rate",
            "type": "number"
          }
        },
        "required": [
          "rate",
          "cashflows"
        ],
        "title": "calculate_npvArguments",
        "type": "object"
      },
      "name": "calculate_npv"
    },
    {
      "description": "Calculate descriptive statistics for a list of numbers.\n    Returns: {mean, median, std_dev, min, max, sum, count, percentiles}",
      "inputSchema": {
        "properties": {
          "numbers": {
            "items": {},
            "title": "Numbers",
            "type": "array"
          }
        },
        "required": [
          "numbers"
        ],
        "title": "calculate_statisticsArguments",
        "type": "object"
      },
      "name": "calculate_statistics"
    },
    {
      "description": "Convert between units. Supports: length, weight, temperature, area, volume.\n    Returns: {result, from_unit, to_unit, formula}",
      "inputSchema": {
        "properties": {
          "from_unit": {
            "title": "From Unit",
            "type": "string"
          },
          "to_unit": {
            "title": "To Unit",
            "type": "string"
          },
          "value": {
            "title": "Value",
            "type": "number"
          }
        },
        "required": [
          "value",
          "from_unit",
          "to_unit"
        ],
        "title": "convert_unitsArguments",
        "type": "object"
      },
      "name": "convert_units"
    },
    {
      "description": "Get current exchange rates from NBU (Ukraine National Bank) — no API key needed.\n    Returns: {rates, base, date, source}",
      "inputSchema": {
        "properties": {
          "base": {
            "default": "USD",
            "title": "Base",
            "type": "string"
          }
        },
        "title": "get_exchange_ratesArguments",
        "type": "object"
      },
      "name": "get_exchange_rates"
    },
    {
      "description": "Server health check.",
      "inputSchema": {
        "properties": {},
        "title": "health_checkArguments",
        "type": "object"
      },
      "name": "health_check"
    }
  ]
}

What the leaf hashes

{"body":"2642d02b1b3edd1e6d6dc31b86187d4969b160eee4690b493ef5ac8b9877ce6d","id":294139,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793049892652345,"prev":null,"subject":"b61564b3-c156-4276-a68e-c1f6385be47d","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. 0x19384cccf8956c880df19e8c9480a33eb9168a78278cd6bd84a4609c2519d40f
2. 0xf93ffc4215d4398fbb58772ed33c1309cfd086ba0517e56322190d8ffe0724e6
3. 0x99562001cf951c756159faa2b26360a0a33596d854677ec50bfea86cd70bee02
4. 0x1ded42312572c599414e82ff50e987c3c8108c9ed5356161d66f58ca186da2b7
5. 0x68bd1d406dc9a986f8dfe7b4f7448a4b46373b98487978d4997895bf57344324
6. 0x407c5b3654004166971120c4beb627a2470dbaf07fce62920bb32cdb5510cc38
7. 0x2a6eb3850757db1860251fb0acd1ff32cc24bd22fb765f6927146cb0d0bbe9dd
8. 0x50664029a2f3bce65e7ab25244ff00d77f357d1c22278c4dc24877e118d9a2f5
9. 0x50566d6198ca8c3af7617938ce8dd24b33dd4d078ae3044e0096ee9b02583a12
10. 0x22a40154924d75fee76be762401605048bce3556b7a3714fb3a594b3875c3a06
11. 0x0ebd017eb4cb5f6f3c01ae6562748898aa3fb42b150504be21c4050acea38366
12. 0x6a8a72430804a14ec575375f3d0ca4364f58310afb2c2e8c92b72f8b75809db9
13. 0xe00c7829e46541e49a308807d357db902e06eff941a833217a8f0dbccd3964f1
14. 0x770e4376196188c7fc9ec40f8e218dc0d1cb92bba5fe0425a0edce27ca9a997f
15. 0x60582ab4b41e72eb70eb0bce07fbf0fb4d2b62a8bad5be50f5d16d511adc746c
16. 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae