Evidence row 296244

What was observed

{
  "count": 6,
  "tools": [
    {
      "description": "Invent a fresh, unused disposable email address you can give out immediately. Nothing is created or reserved server-side — an address exists as soon as mail arrives at it — so this never fails and needs no account. Public domains: grabmail.io, mixozia.com, linqmail.com. With a paid key sent as Authorization: Bearer, a premium-pool domain from list_domains works too.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "domain": {
            "description": "Which domain to use: a public domain (grabmail.io, mixozia.com, linqmail.com), or, with a paid key, one of the premium-pool domains returned by list_domains. Defaults to grabmail.io.",
            "type": "string"
          },
          "prefix": {
            "description": "Optional readable prefix; a random suffix is added so it stays unique.",
            "maxLength": 40,
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "create_inbox"
    },
    {
      "description": "Remove a message now rather than waiting for it to expire. Idempotent.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "address": {
            "description": "The full address, e.g. something@grabmail.io",
            "type": "string"
          },
          "id": {
            "type": "string"
          }
        },
        "required": [
          "address",
          "id"
        ],
        "type": "object"
      },
      "name": "delete_message"
    },
    {
      "description": "The public domains anyone may use. A domain of your own needs no account or key either — just an MX record pointing here. These public domains are on disposable-mail blocklists; if a form rejects them, see the premium pool noted in the result. With a paid key sent as Authorization: Bearer, the result also lists the premium-pool domain names.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "list_domains"
    },
    {
      "description": "Everything waiting at an address, newest first. Returns immediately, including when the mailbox is empty — use wait_for_message if you are expecting something that has not arrived yet.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "address": {
            "description": "The full address, e.g. something@grabmail.io",
            "type": "string"
          },
          "before": {
            "description": "Cursor from a previous call, to read older messages.",
            "type": "string"
          },
          "limit": {
            "default": 50,
            "maximum": 200,
            "minimum": 1,
            "type": "integer"
          }
        },
        "required": [
          "address"
        ],
        "type": "object"
      },
      "name": "list_messages"
    },
    {
      "description": "The full message: sender, subject, plain text, HTML and any attachments. This is where a confirmation code or a sign-in link will be. Read `text`: when the sender shipped HTML only, as most transactional mail does, it holds a plain-text rendering of that HTML rather than nothing, with link targets and image alt text kept.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "address": {
            "description": "The full address, e.g. something@grabmail.io",
            "type": "string"
          },
          "id": {
            "description": "The message id from list_messages or wait_for_message.",
            "type": "string"
          }
        },
        "required": [
          "address",
          "id"
        ],
        "type": "object"
      },
      "name": "read_message"
    },
    {
      "description": "Blocks until a new message arrives at the address, then returns it in full — the tool to use after submitting a sign-up form. Waits at most 25 seconds and then returns with timed_out set to true; call it again to keep waiting. Optionally waits for a message from a particular sender or with particular words in the subject, ignoring anything else that arrives.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "address": {
            "description": "The full address, e.g. something@grabmail.io",
            "type": "string"
          },
          "from_contains": {
            "description": "Only accept a message whose sender contains this.",
            "type": "string"
          },
          "since_id": {
            "description": "Ignore this message and anything older; pass the newest id you have already seen.",
            "type": "string"
          },
          "subject_contains": {
            "description": "Only accept a message whose subject contains this.",
            "type": "string"
          },
          "timeout_seconds": {
            "default": 25,
            "maximum": 25,
            "minimum": 1,
            "type": "integer"
          }
        },
        "required": [
          "address"
        ],
        "type": "object"
      },
      "name": "wait_for_message"
    }
  ]
}

What the leaf hashes

{"body":"d268f2ad59365fca50587fd1b6b32355e3263c4e3fad72b9b50817b1912e0df5","id":296244,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793051532593861,"prev":null,"subject":"b5da4989-10a5-439a-9b6b-f4806956cc6d","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. 0x928644ebfa958a456cbc12ac4726d9e82a2afd65d654092d81e882658c3cf934
2. 0xb0916faf3f9116612ffef3c125c1c7fe6f2a9617fb396956820c8df546b9957d
3. 0xcf1074afd600d35b049536eaf2dd0c4716add8908a4734cfc093d90a5d62b4ec
4. 0xeddf6b6c8d427e262adf940ba498638044dfca55bbbc4f2a57c9e3be6ea331f2
5. 0x2199425392577a34bd98abd28da84ac99f06613634abcebd1c2f43fa5aa51bc5
6. 0x7f117e1272cdbc49824d1330cc7437be5e2e4fa3afa32368a26a2526a74f4ceb
7. 0xd2018c8acfb5dedfdbf13e1c6ef3736f45553da8ce1bc91274448f44c7c5ea62
8. 0x9a8f365c9ada4c4fbefc51e28dd0f0b441e3aba3828b296ec0287a6c01fc9eb5
9. 0x0c136dfcc1f943282b0084289338ad92a791a3ef38b386ba57b7a931b20edfcf
10. 0x8a45c6c1da5d073416437d0946f0ab55916b463036f2f88da85a39961d6874d8
11. 0xdcd590752acb338329aec3087ddc69ef4b8fcbe0bb91a9b8e37e17c10a9dfe92
12. 0x3b55f6d5345bce3e1332e014f19526d25328fb6283d3518837a015c3621c0d1c
13. 0x45c1d3062bbe98a6b1540c7e2ccf6516eedd6ef07fdfeb1ba77ee6272970447c
14. 0xf0edabbb9ba0d643e5505d19d07637eb6f6aed0a1c7356af43ae7d84ae9ef0c5
15. 0xf0bd63870f0bb378fa300bd33563050dcb7b3e02b44eb3ee550c1c534ec4b246
16. 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae