Evidence row 292658

What was observed

{
  "count": 2,
  "tools": [
    {
      "description": "Use this when the user wants a currency converter or the currency exchange rate today, for example to convert usd to eur, euro to dollar, or the rate on date for any day back to 1999-01-04. It uses the European Central Bank euro reference rates (published on working days around 16:00 CET) and returns the converted amount, the rate, the inverse rate and the actual rate date, for up to 10 target currencies. Rates are indicative mid-market rates, not a bank or card rate, and there is no cryptocurrency. Do not use for crypto, metals or live market quotes.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "amount": {
            "description": "The amount of money to convert, greater than 0 and up to 1e12, with at most 2 decimals. Example: 100.50.",
            "type": "number"
          },
          "date": {
            "description": "Optional rate date as YYYY-MM-DD (1999-01-04 or later, not in the future). Example: 2026-10-16. Omit for the latest published rate.",
            "type": "string"
          },
          "from": {
            "description": "The ISO 4217 currency code to convert from, e.g. USD.",
            "type": "string"
          },
          "to": {
            "description": "One to ten ISO 4217 currency codes to convert to, separated by commas. Example: EUR or EUR,JPY,GBP.",
            "type": "string"
          }
        },
        "required": [
          "amount",
          "from",
          "to"
        ],
        "type": "object"
      },
      "name": "convert_currency"
    },
    {
      "description": "Use this when the user asks for an exchange rate history or a historical exchange rate, or the conversion of currency data over a date range, or wants a CSV of rates. It returns the daily European Central Bank euro reference rates for up to 5 quote currencies over at most 366 days, with min, max, average and the first-to-last change in percent, plus a CSV download and a line chart in the widget. It shows published working days only (no weekends or ECB holidays) and is not financial advice. Do not use for stocks, crypto or commodity prices.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "base": {
            "description": "The ISO 4217 code of the base currency, e.g. USD. Rates are per 1 unit of this currency.",
            "type": "string"
          },
          "end": {
            "description": "The last date of the range as YYYY-MM-DD, at most 366 days after start. Example: 2026-03-31.",
            "type": "string"
          },
          "quote": {
            "description": "One to five ISO 4217 quote currency codes, separated by commas. Example: EUR or EUR,JPY.",
            "type": "string"
          },
          "start": {
            "description": "The first date of the range as YYYY-MM-DD. Example: 2026-01-01.",
            "type": "string"
          }
        },
        "required": [
          "base",
          "quote",
          "start",
          "end"
        ],
        "type": "object"
      },
      "name": "rate_history"
    }
  ]
}

What the leaf hashes

{"body":"2a26e4de3188c45f233f33c58924006acbbf953d8df54b43dcabfeb0ebcf2483","id":292658,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793048899513237,"prev":null,"subject":"14ed8324-10af-493a-b0f8-940e798174eb","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. 0xc4d4fcdd98e18d6f1a189058d65aab5815b55b1fe4838fa03d5e6f1ee99e5622
2. 0x9a4aea2b94c93accfb54ae976f0fe26f941721680c3ff7a0558b2d20227e7a3a
3. 0x43092bb41ca46bac1cd31c821ca3891f17b901502b376e208b60185a4282c1c6
4. 0x4901e817bb2549f82806f9cb758b5f18d6c6cd3384b2d5ed6b15aa5768e2a500
5. 0x837fcf544271412367fcd3582368c31fd90540d449eb99d87953fda9fc2c5859
6. 0x0f8f3b3714b560469ec6e882b57de74b7c7fbc40ffb329ced7bbbe413989acca
7. 0x23b1f1b356bdeb9bc6d872b762ccd9510651bd76c92070847ce654ea0582eb32
8. 0x22d3b29ba2ccd8f50c09acbec4c3c1d9527bd3c9cd90bed7e6e25c7a34cdda9e
9. 0x0aaa0fc7f6b1e014f71cabe15ae65df3a64e05db353716b554b870df619811dd
10. 0xae71c3940eac3236f4c68fb44d25cc1262b73d017fd7c18fbff1248c2e850602
11. 0x463fef738ef71a01d4aa9ac1c6836fcf6802cdaa7de01bbe42397d79d35d8671
12. 0x4d1a020de7fc0aa076daeb62ebb904d51ac6c607b605eb63a7855f34d7b69f1b
13. 0x641fba1f23ec69d96721e34ace1926954d835b9614cb5eae215a069c056399b8
14. 0xdbe2e8dd65ea1248b2936612538f18268abd5cf27ebdab3737694571ad496004
15. 0x9f68b5e15459cb62b8c0cd4c124fa61c74147b4a5755a200fbecd21a581635d1
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae