Evidence row 292798

What was observed

{
  "count": 2,
  "tools": [
    {
      "description": "Use this when the user wants the list of public holidays for a country (and optionally a state or region) in a year, for example to check what a printed calendar will mark (\"bank holidays 2027 UK\", \"Texas holidays 2027\", \"Feiertage Bayern 2027\"). Returns each holiday with its date, weekday and type, including observed weekdays when a holiday falls on a weekend; observances are optional. Does not count business days between dates, and does not cover school terms or religious calendars outside the holiday data.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "country": {
            "description": "Country: ISO two-letter code or name, e.g. US, GB, DE, PL, FR, JP, BR, AU, CA.",
            "maxLength": 60,
            "type": "string"
          },
          "include_observances": {
            "description": "Also show observances, bank and optional days (e.g. Mother's Day, Valentine's Day, Christmas Eve). Default false: public holidays only.",
            "type": "boolean"
          },
          "language": {
            "description": "Language for month and weekday names: en (default), pl, de, es, fr, it, pt, nl or ja. Holiday names use this language when the country's data has it, else English. Example: de",
            "maxLength": 20,
            "type": "string"
          },
          "subdivision": {
            "description": "Optional state, province or region for local holidays, e.g. TX or CA (US), BY (Bavaria, DE), SCT (Scotland), NSW (AU), ON (CA).",
            "maxLength": 60,
            "type": "string"
          },
          "year": {
            "description": "Year, e.g. 2027. Default: next year from October on, otherwise this year.",
            "maximum": 2200,
            "minimum": 1950,
            "type": "integer"
          }
        },
        "required": [
          "country"
        ],
        "type": "object"
      },
      "name": "find_holidays"
    },
    {
      "description": "Use this when the user wants a printable calendar (\"printable calendar\", \"2027 calendar printable\", \"monthly calendar template\", \"yearly calendar\", \"wall calendar\", \"school year calendar\", \"calendar with holidays\") as a PDF. Builds a year on one page, a 12-month wall calendar with cover, a single month, or a month range up to 24 months, with public holidays for a country and state, custom birthdays and events, Monday or Sunday weeks, ISO week numbers, notes lines, paper size, language and an accent colour. Returns a preview and a PDF download link. Does not add events to Google, Outlook or Apple calendars, does not schedule meetings, and does not draw lunar, Hijri or Hebrew calendars.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "accent": {
            "description": "One accent colour for headings and holiday marks: a hex code like #0F766E or a name (indigo, blue, navy, teal, green, olive, red, crimson, pink, purple, orange, amber, brown, slate, gray, black). Default indigo.",
            "maxLength": 20,
            "type": "string"
          },
          "bleed": {
            "description": "Add a 0.125 in print bleed with trim marks in the PDF boxes, for professional printing. Default false.",
            "type": "boolean"
          },
          "country": {
            "description": "Country for public holidays: ISO two-letter code or name, e.g. US, GB, DE, PL, FR, JP, BR, AU, CA. Omit for a calendar without holidays.",
            "maxLength": 60,
            "type": "string"
          },
          "end": {
            "description": "For layout range: last month as YYYY-MM (at most 24 months after start), e.g. 2027-06.",
            "maxLength": 20,
            "type": "string"
          },
          "events": {
            "description": "Custom events and birthdays (up to 60). Example: [{\"date\":\"03-04\",\"title\":\"Mom's birthday\"},{\"date\":\"2027-06-12\",\"title\":\"Wedding\"}]",
            "items": {
              "properties": {
                "date": {
                  "description": "MM-DD for every year (a birthday, e.g. 03-04) or YYYY-MM-DD for one date (e.g. 2027-05-14). \"Mar 4\" also works.",
                  "maxLength": 30,
                  "type": "string"
                },
                "title": {
                  "description": "Short label drawn in the day cell, e.g. Mom's birthday.",
                  "maxLength": 60,
                  "type": "string"
                }
              },
              "required": [
                "date",
                "title"
              ],
              "type": "object"
            },
            "maxItems": 60,
            "type": "array"
          },
          "holidays": {
            "description": "Show public holidays when a country is given. Default true; false hides them.",
            "type": "boolean"
          },
          "include_observances": {
            "description": "Also show observances, bank and optional days (e.g. Mother's Day, Valentine's Day, Christmas Eve). Default false: public holidays only.",
            "type": "boolean"
          },
          "language": {
            "description": "Language for month and weekday names: en (default), pl, de, es, fr, it, pt, nl or ja. Holiday names use this language when the country's data has it, else English. Example: de",
            "maxLength": 20,
            "type": "string"
          },
          "layout": {
            "description": "year = whole year on one page; wall = 12-month wall calendar, a cover plus one month per page; month = one month on one page; range = one page per month from start to end (e.g. a school year). Example: wall",
            "enum": [
              "year",
              "wall",
              "month",
              "range"
            ],
            "maxLength": 30,
            "type": "string"
          },
          "month": {
            "description": "For layout month: the month as YYYY-MM, e.g. 2027-03.",
            "maxLength": 20,
            "type": "string"
          },
          "notes": {
            "description": "Add a ruled notes area under each month page (not on the one-page year). Default false.",
            "type": "boolean"
          },
          "orientation": {
            "description": "Page orientation. Default landscape. Example: portrait",
            "enum": [
              "landscape",
              "portrait"
            ],
            "maxLength": 30,
            "type": "string"
          },
          "paper": {
            "description": "Paper size: letter (8.5x11 in), a4, a3 or tabloid (11x17 in). Default letter for US/Canada/Mexico, a4 for other countries.",
            "enum": [
              "letter",
              "a4",
              "a3",
              "tabloid"
            ],
            "maxLength": 30,
            "type": "string"
          },
          "start": {
            "description": "For layout range: first month as YYYY-MM, e.g. 2026-08.",
            "maxLength": 20,
            "type": "string"
          },
          "start_month": {
            "description": "First month (1-12) for a 12-month year or wall calendar; 8 makes an August-to-July academic calendar. Default 1.",
            "maximum": 12,
            "minimum": 1,
            "type": "integer"
          },
          "subdivision": {
            "description": "Optional state, province or region for local holidays, e.g. TX or CA (US), BY (Bavaria, DE), SCT (Scotland), NSW (AU), ON (CA).",
            "maxLength": 60,
            "type": "string"
          },
          "title": {
            "description": "Optional title printed on the calendar, e.g. \"Kowalski Family 2027\". Default: the year or month.",
            "maxLength": 80,
            "type": "string"
          },
          "week_numbers": {
            "description": "Print ISO 8601 week numbers beside each week row. Default false. Example: true",
            "type": "boolean"
          },
          "week_start": {
            "description": "First day of each week row. Default: the country's custom (Sunday for US, CA, BR, JP...; Monday for most of Europe); without a country, Sunday for English, Monday otherwise. Example: monday",
            "enum": [
              "monday",
              "sunday"
            ],
            "maxLength": 30,
            "type": "string"
          },
          "year": {
            "description": "Year for layout year or wall, e.g. 2027. Default: next year from October on, otherwise this year.",
            "maximum": 2200,
            "minimum": 1950,
            "type": "integer"
          }
        },
        "required": [
          "layout"
        ],
        "type": "object"
      },
      "name": "generate_calendar"
    }
  ]
}

What the leaf hashes

{"body":"77a402c35ffb280406d0bc8892a1813b99ba71617a044ba2143d4b0afe4e2b2a","id":292798,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793048967098787,"prev":null,"subject":"ee15131e-ddf3-4b2d-a82c-d35bbc2624ff","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. 0x7025462e0b8f62783c02791a6702fe0f3d959ceaec597ab87f678f597f1ff609
2. 0x3cf9516ddb89d7f4716a3cadaaba17482d2cc1036fa89e58f3209e3f07fa6bec
3. 0xdbb80cb83ff89a19492dc9b072688f08d6dd547c9072040d4bb208ece229a7a1
4. 0x699a7aa5717fc5b2f4e915b72029af6fa960d9b7033c3edb0a5e9daa75bab5dd
5. 0x9654bbbd55a34918dc947897b404d468888193eba0895f9a33b60375d2be25d8
6. 0x7e579dcf3398d0cddb426eb1d49a1b0782f41a5513ce4821f99b4ff66a3e19c5
7. 0xa1da9f89714a64c567a27f98456a5abba0fbc00e30463ecfbff781a4fb03e697
8. 0xbae03f30a589898484fe027e78075c8d608e18c14af78b90da5926cc5bb2bd88
9. 0x6b772998359d0f60f0a087cf071ec87ae4529378e09cdd68ec0e7418c896d406
10. 0x19792535bf1364a9338820b204b05ce0f6bf3690fa1496a73e82726a450f66c4
11. 0x83da3d3b0ffc00454b09f0b6f54a0a4bb8b5fabd87854d6bb2d7abda681b5d72
12. 0x5be1d69fd9353c3a75685caffea8c98e8f079f5072011c82517cc5f365ba32f8
13. 0x14b83e3bc6587240f31cd033d09d131e0775b7b00aada9042597008a70399013
14. 0xfc9b5a81a7a83a1c735a4fe64590beb9db14d2366f463161358af28c3ea9a81d
15. 0xa2d436d488e3600b0e5c3e3ed9c9234cd52853c59830b786334fd0c4292d9f40
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae