Evidence row 520268

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "Use when someone has a headcount and either a total or a per-person amount and wants to know what each person gets. Returns the per-person and total amounts, the matching price band, and a link to the guide for that band. This uses the same math as the Corporate Gift Picks budget tool.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "amount": {
            "description": "Budget in US dollars.",
            "exclusiveMinimum": 0,
            "type": "number"
          },
          "amount_type": {
            "description": "Whether amount is per person or the total for everyone.",
            "enum": [
              "per_person",
              "total"
            ],
            "type": "string"
          },
          "headcount": {
            "description": "Number of people receiving a gift.",
            "maximum": 100000,
            "minimum": 1,
            "type": "integer"
          }
        },
        "required": [
          "headcount",
          "amount",
          "amount_type"
        ],
        "type": "object"
      },
      "name": "estimate_gift_budget"
    },
    {
      "description": "Use when someone wants gift ideas for a given budget and recipient, such as employees, clients or a law firm's clients. Returns up to 5 picks, each with the item name, price band, a one-line reason it fits, who it suits, a direct affiliate link when we have one, and a link to the guide. It shows price bands rather than current prices. A budget from $75 to $150 spans 75_to_100 and 100_to_150: call this tool once for each band. When a result includes a disclosure, show this sentence word for word: \"As an Amazon Associate we earn from qualifying purchases.\"",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "budget_band": {
            "description": "Per-person price band in US dollars. If the user gives an amount, pick the narrowest band that contains it, or call estimate_gift_budget first.",
            "enum": [
              "under_25",
              "25_to_50",
              "50_to_100",
              "100_and_up",
              "250_to_500",
              "500_to_1000",
              "1000_and_up",
              "75_to_100",
              "100_to_150",
              "150_to_200",
              "200_to_300",
              "300_to_500"
            ],
            "type": "string"
          },
          "limit": {
            "default": 3,
            "description": "How many picks to return.",
            "maximum": 5,
            "minimum": 1,
            "type": "integer"
          },
          "occasion": {
            "description": "Optional moment, such as thank-you. Leave it out for every moment in the band.",
            "enum": [
              "employee-appreciation",
              "employee-appreciation-2027",
              "holiday-2026",
              "holiday-ok",
              "hostess",
              "milestone",
              "thank-you",
              "welcome"
            ],
            "type": "string"
          },
          "recipient": {
            "description": "Who the gift is for. Leave it out for general picks.",
            "enum": [
              "employees",
              "clients",
              "law_firm_clients",
              "accounting_firm_clients",
              "financial_advisor_clients",
              "vendors_partners"
            ],
            "type": "string"
          }
        },
        "required": [
          "budget_band"
        ],
        "type": "object"
      },
      "name": "find_gift_picks"
    },
    {
      "description": "Use when someone asks for the last day to ship a gift so it arrives before Christmas, or how many days are left. Returns USPS's published 2026 holiday ship-by dates for the lower 48 states by mail service, with the USPS source and the date we last checked. Each result includes the note \"Carrier published dates, not a guarantee. Order a few days earlier, and earlier still for logo items.\" For UPS and FedEx, it says to check the carrier's own schedule for the route.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "service": {
            "description": "USPS mail service to look up. Leave it out to get every service.",
            "enum": [
              "ground_advantage",
              "first_class_mail",
              "priority_mail",
              "priority_mail_express"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "get_holiday_ship_by_dates"
    },
    {
      "description": "Use when someone wants to read a full guide or see what Corporate Gift Picks covers. Returns guides by recipient, budget or topic (such as gift cards or Christmas gifts for employees), each with its title, a one-line summary and its link.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "budget_band": {
            "description": "Filter by per-person price band.",
            "enum": [
              "under_25",
              "25_to_50",
              "50_to_100",
              "100_and_up",
              "250_to_500",
              "500_to_1000",
              "1000_and_up",
              "75_to_100",
              "100_to_150",
              "150_to_200",
              "200_to_300",
              "300_to_500"
            ],
            "type": "string"
          },
          "recipient": {
            "description": "Filter by who the gift is for.",
            "enum": [
              "employees",
              "clients",
              "law_firm_clients",
              "accounting_firm_clients",
              "financial_advisor_clients",
              "vendors_partners"
            ],
            "type": "string"
          },
          "topic": {
            "description": "Filter by topic.",
            "enum": [
              "gift_cards",
              "christmas_employees",
              "ship_by_dates",
              "budget_tool"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "list_gift_guides"
    }
  ]
}

What the leaf hashes

{"body":"94b5a7944d4249838619b19c520a6cf9c6aa30cc77ea379151a729d95b916f20","id":520268,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793122764524058,"prev":null,"subject":"8de1fd1b-9719-45b6-b835-10f10202ec3d","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0xe082ff137015363a5dd40bfc9610161ae74097bee6e5c43a960e49dd1fc2d3e2
2. 0x570f2eb6d9e1b03d62dce9e06394914d8a0bd243f22e04ec995da35373d5601c
3. 0x8d4e9e50c8f9ed1f7535b838f7377e7da70449b8cbe29c115ca1459b3f6abc51
4. 0x4365320faadf12cdd1288a3dbf54cd980411f7c6b6c2e2fcc5de4e9ff457db6d
5. 0x30c80634c43baaa5d9d1fe330f7fd5e565006b9ac2bac84ed35e6ab320d25505
6. 0xbcb57803b110a77173591e1fe1b1a38fad20b4c9d45e4fd6f59642e39e4712bd
7. 0x5f15f6ef706e4bb9ebf7aac2a706daacd6d2b5e48f7ba11d87339e69f4669a2d
8. 0x808e5a3f5f1db96a44de2bfa73496fff87b33a9722adac3ac95ecb4881eb8824
9. 0x0056c5452b49ca8bc04faba6171b7da48cca86d805064ffe303b3b407e21998f
10. 0x4ff8cd873a6525b7fd245edfbfa207e515bf9fc192259f1978e27252732bb31e
11. 0xd0d909352f9e85f35de7c6378041c31c709c848a1c4fc17002cbf5d0b312d061
12. 0xa7bf7b9cc7b39dca708cf0cc5d77059435823b975a1b485d07bbb69188527cb0
13. 0x979156f4f0a1ab811055c0a4d2b45bfa74d4bef619c176540454ee8d15e5bebc
14. 0xf72dee7a0c7534cb19ede4959b957b00c0a8285c36ad49dd2ce1c1092bf60d93
15. 0x24e3e2bb8ee1e8d20756de35f0e0c4ec8eb1f193bd2cf3f077ee1f92f211c34d
16. 0x8745bd887f5ce9f7a49558fd2b04cdcd97a05ea9f8a23f62d0e80cb13d328b0f
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4