Evidence row 306209

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "One event on GdzieZabawa.pl by its id (slug) or page URL: name, next date and time, place, municipality, admission, description, further dates and the source website. / Szczegóły jednej imprezy.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "id": {
            "description": "Event id (slug) from search_events.",
            "maxLength": 200,
            "minLength": 3,
            "type": "string"
          },
          "url": {
            "description": "Event page URL, e.g. https://gdziezabawa.pl/wydarzenie/dni-skawiny",
            "maxLength": 300,
            "minLength": 10,
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "get_event"
    },
    {
      "description": "Event categories used by GdzieZabawa.pl (slug, Polish name, number of upcoming events) for the category filter of search_events. / Lista kategorii imprez.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "list_categories"
    },
    {
      "description": "Permanent places for free time in one Polish municipality from OpenStreetMap (© OpenStreetMap contributors, ODbL): cinemas, swimming pools, aquaparks, museums, parks, playgrounds, bowling, escape rooms, zoos. Name, kind, address, website and opening hours when known. For \"what to do on a rainy day\" or \"where to go with kids\" when no event fits. / Stałe atrakcje „na nudę” w gminie: kino, basen, muzeum, park, plac zabaw.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "limit": {
            "default": 20,
            "description": "Maximum places (1-50, default 20).",
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "municipality": {
            "description": "Polish municipality (gmina) or town in nominative case, e.g. \"Skawina\", \"Kraków\". If the name exists in several voivodeships, add `voivodeship`. / Gmina lub miasto.",
            "maxLength": 80,
            "minLength": 2,
            "type": "string"
          },
          "voivodeship": {
            "description": "Voivodeship (lowercase Polish). / Województwo.",
            "enum": [
              "dolnośląskie",
              "kujawsko-pomorskie",
              "lubelskie",
              "lubuskie",
              "łódzkie",
              "małopolskie",
              "mazowieckie",
              "opolskie",
              "podkarpackie",
              "podlaskie",
              "pomorskie",
              "śląskie",
              "świętokrzyskie",
              "warmińsko-mazurskie",
              "wielkopolskie",
              "zachodniopomorskie"
            ],
            "type": "string"
          }
        },
        "required": [
          "municipality"
        ],
        "type": "object"
      },
      "name": "municipality_attractions"
    },
    {
      "description": "Search upcoming local events in Poland listed on GdzieZabawa.pl, for questions like \"what to do this weekend in my town\", \"dożynki, jarmarki or festyny nearby\", \"free events for kids in Kraków\": festivals, dożynki, town days, fairs, picnics, children's events, concerts, theatre, cabaret. Filters: municipality, voivodeship, dates or a `when` shortcut, category, free admission, title phrase. Returns up to 20 events per call (page with offset/next_offset) with date, time, place, admission and event page link, plus the total. Default range: the catalogue window (about the next two months). / Co robić w weekend w gminie: festyny, dożynki, jarmarki, imprezy dla dzieci; gmina, województwo, daty, kategoria, wstęp wolny.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "category": {
            "description": "Event category (see list_categories).",
            "enum": [
              "koncert",
              "festyn",
              "dozynki",
              "jarmark",
              "zabawa",
              "osp",
              "dni_miasta",
              "odpust",
              "piknik",
              "swieto",
              "swiateczne",
              "dla_dzieci",
              "sport",
              "kultura",
              "inne"
            ],
            "type": "string"
          },
          "date_from": {
            "description": "First day, YYYY-MM-DD (default today).",
            "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
            "type": "string"
          },
          "date_to": {
            "description": "Last day, YYYY-MM-DD (inclusive).",
            "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
            "type": "string"
          },
          "free_only": {
            "description": "Only events with free admission (wstęp wolny).",
            "type": "boolean"
          },
          "limit": {
            "default": 10,
            "description": "Maximum events (1-20, default 10).",
            "maximum": 20,
            "minimum": 1,
            "type": "integer"
          },
          "municipality": {
            "description": "Polish municipality (gmina) or town in nominative case, e.g. \"Skawina\", \"Kraków\". If the name exists in several voivodeships, add `voivodeship`. / Gmina lub miasto.",
            "maxLength": 80,
            "minLength": 2,
            "type": "string"
          },
          "offset": {
            "default": 0,
            "description": "Skip this many matches; use next_offset.",
            "maximum": 2000,
            "minimum": 0,
            "type": "integer"
          },
          "query": {
            "description": "Words from the event title, e.g. \"dożynki\", \"mikołajki\", \"jarmark\". / Fraza z nazwy imprezy.",
            "maxLength": 80,
            "minLength": 2,
            "type": "string"
          },
          "voivodeship": {
            "description": "Voivodeship (lowercase Polish). / Województwo.",
            "enum": [
              "dolnośląskie",
              "kujawsko-pomorskie",
              "lubelskie",
              "lubuskie",
              "łódzkie",
              "małopolskie",
              "mazowieckie",
              "opolskie",
              "podkarpackie",
              "podlaskie",
              "pomorskie",
              "śląskie",
              "świętokrzyskie",
              "warmińsko-mazurskie",
              "wielkopolskie",
              "zachodniopomorskie"
            ],
            "type": "string"
          },
          "when": {
            "description": "Date shortcut in Europe/Warsaw; this_weekend = Saturday-Sunday. Overrides date_from/date_to.",
            "enum": [
              "today",
              "tomorrow",
              "this_weekend",
              "next_7_days",
              "next_30_days"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_events"
    }
  ]
}

What the leaf hashes

{"body":"b4c81fcb837ca377076ce3ea3bd954bb61a1b43dd455c0c9f0f47870d395bebe","id":306209,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793056869135072,"prev":null,"subject":"29df4c1d-e8ab-4c3e-8cdd-21dbc55d5870","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. 0xba38491446ef541fd296c4ae3a025d372704f4994839e5b5fca359c5e66f662e
2. 0x1fc1e6cd0ac851777d8008a3246530f7315709282dfd3d144f5645097d38520e
3. 0x8bdd8b0806fd1d377eae96e89cb345e54a0056facd9d6912ca3cd210512d9f18
4. 0x784f0fff3894f75af4ef159e073c4e1ceefede5f0b163ef44426f82d20ab9974
5. 0xd262829145f2d6a65bd0d032f50676b5b049d4c1e55369ef52570d7b4af5ab4c
6. 0xdcc65577909a970a244e350d011eb2a80a84c84804568c83c2505be65328b22b
7. 0x78d5703ff08998f3ce984c6221154ef6e642742c749904cd14c47e05ebafcd00
8. 0x35c10a21115c901b099331e9d16640eff4e982e73a6d4b21de7cbe538ccba336
9. 0x1c0b9e7c7d798708a72a4b95083b47daf3ea559cec400efcfabfc8fe92988260
10. 0xdd4be627d1b063bd616b9a615efea7de87d552756726682d7d4d9d9e1ddb4856
11. 0xd0a8fcd7581320df765e293ac18ecdb0c84895304e75682f6c130e9b5c6b0ed8
12. 0x1a61f9ab4a9304db8146c466be341271a345718ebf06b718e0f0dd9f347d2fbd
13. 0x2f43fe2b2533a5f40c107c114e458e226102f5f8ae91f097e964345880e30928
14. 0xf692ce2b0a640ec9f75aa960e5fb1c2c7091a04e24881798735752c19014e519
15. 0x9f68b5e15459cb62b8c0cd4c124fa61c74147b4a5755a200fbecd21a581635d1
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae