Evidence row 2158326

What was observed

{
  "count": 5,
  "tools": [
    {
      "description": "Add N business days to a start date, skipping weekends and public holidays.",
      "inputSchema": {
        "properties": {
          "country": {
            "description": "ISO 3166-1 alpha-2, default US",
            "type": "string"
          },
          "days": {
            "description": "Non-negative integer",
            "type": "integer"
          },
          "start": {
            "description": "YYYY-MM-DD",
            "type": "string"
          }
        },
        "required": [
          "start",
          "days"
        ],
        "type": "object"
      },
      "name": "add_business_days"
    },
    {
      "description": "Convert an ISO-8601 instant (or naive local with from=) between IANA zones, handling DST.",
      "inputSchema": {
        "properties": {
          "from": {
            "description": "Source IANA zone if iso is naive",
            "type": "string"
          },
          "iso": {
            "description": "ISO-8601 datetime",
            "type": "string"
          },
          "to": {
            "description": "Target IANA zone (default UTC)",
            "type": "string"
          }
        },
        "required": [
          "iso"
        ],
        "type": "object"
      },
      "name": "convert"
    },
    {
      "description": "Whether a YYYY-MM-DD date is a business day in a country (weekend + Nager.Date public holidays).",
      "inputSchema": {
        "properties": {
          "country": {
            "description": "ISO 3166-1 alpha-2, default US",
            "type": "string"
          },
          "date": {
            "description": "YYYY-MM-DD",
            "type": "string"
          }
        },
        "required": [
          "date"
        ],
        "type": "object"
      },
      "name": "is_business_day"
    },
    {
      "description": "Current instant plus wall-clock time in an IANA timezone (e.g. America/Chicago). Includes offset and DST flag.",
      "inputSchema": {
        "properties": {
          "tz": {
            "description": "IANA timezone, default UTC",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "now"
    },
    {
      "description": "Resolve expressions like \"next Tuesday 3pm\", \"tomorrow 9am\", or \"in 2 business days\" in a timezone.",
      "inputSchema": {
        "properties": {
          "country": {
            "description": "ISO country for business-day exprs (default US)",
            "type": "string"
          },
          "expr": {
            "type": "string"
          },
          "tz": {
            "description": "IANA timezone",
            "type": "string"
          }
        },
        "required": [
          "expr",
          "tz"
        ],
        "type": "object"
      },
      "name": "resolve_expression"
    }
  ]
}

What the leaf hashes

{"body":"d82012acfd13ffc0807f3610741d75d5c02e27a24589b970d0d7b9ffee3c3248","id":2158326,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793630823832727,"prev":null,"subject":"dc4a0308-ba6d-44c0-9872-c407437b3de9","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-02 (444186 rows).

1. 0xaf40a1e5be424398cda3e08aa6cd5eedb308340d6ea6800c69d77ada32f8754a
2. 0x8f0622d015e3d158a53ca80fab57603fb39f371a79dc15884297f49575ab3c1b
3. 0xba5ede768c4ab2278168e20f62e3031f5392f10e52d8c9f77290d0a2f85466c4
4. 0x17307b9415555d0957fe5766441b4932f603280da51987822e1d3fe25cc68c59
5. 0xa6517aeb620a5eab9b2174fcddb440105469795e2f1ca7e3a841a9bfb1d07ff2
6. 0x0c0ae2abd5d29173d25e3ac9e2aa8a3a1f10f782bc8e0fa9780b54aaa74c5913
7. 0xa0210e5bf8da785425bc4823a7571ccc4acd95f36b3fe2c7f2d6d077191a1cfa
8. 0xa5d45fbb90b0e7dcf1df013e9fbea015f320a3c7d7e0da5bf1278bf7c7647d6a
9. 0xbfd578be63959f61995ecffb9a07e2fe8493297746ddc59157f8af2a6880488a
10. 0xcc1e2be1b07d2749797c343fd80ed2ed97dee2ce056d01083e1500fb1d0b4c53
11. 0x3afbe32e2dba45a7b2035f3a2323a5d5f2cd1fcf4a91cbbe61f4e64d0914885d
12. 0x019dcf9ef14ccef70a9013eb1e525d28ee135665e1f6a7649fa663cb42a31a57
13. 0x026aca682cb5dc6926296949fd7c047905eb55f048c3a7c3bfbbb67e9d07fee8
14. 0x2f8469a138f90dfcfc93d4f817bc8f20341a871e08f629fe27a2cd40dbfeb340
15. 0x793184605629cd36ba80a07cbe115ca35e8923297bf024260c6f5c06b255f638
16. 0x2922573a524a0694086782ac45fa3083d3fc3f6a2a479b2105e1e2f06b2916f7
17. 0x07ad80c0c234ecea379a2f4450dfd0804db049dbc62abe77af6306049ca6b6c2
18. 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
19. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af