Evidence row 2539370

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "Lists the destination countries available for holiday package search, with names and the two-letter country codes used by search_packages. Read-only.",
      "inputSchema": {
        "properties": {},
        "type": "object"
      },
      "name": "get_countries"
    },
    {
      "description": "Lists the regions and cities of one destination country, with names and codes; a code narrows search_packages through its regionCode parameter. Read-only.",
      "inputSchema": {
        "properties": {
          "countryCode": {
            "description": "Two-letter destination country code (e.g. 'ES' for Spain, 'GR' for Greece), as listed by get_countries.",
            "type": "string"
          }
        },
        "required": [
          "countryCode"
        ],
        "type": "object"
      },
      "name": "get_regions"
    },
    {
      "description": "Suggests holiday destinations for a natural-language request (e.g. 'warm beach in November with small children'). Returns destination ideas with an indicative package price per person, the reason each one matches, and the countryCode that search_packages accepts. Suited to requests without a chosen destination country. Read-only.",
      "inputSchema": {
        "properties": {
          "query": {
            "description": "What the user is looking for, in one or two short sentences, including the constraints that apply to this search (e.g. 'sunny beach holiday in June from Warsaw, 2 adults and a 5-year-old, under 6000 PLN').",
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "search_inspirations"
    },
    {
      "description": "Searches holiday packages (flight + hotel) to one destination country. Returns packages with hotel name, stars, guest rating, board, departure date and airports, total and per-person price, and a link to book on the brand's website. Filters: dates, nights, travellers, departure airport, price, stars, board and region (regionCode from get_regions of the same country, countryCode from get_countries); sorting by popularity, price, rating or stars; cursor pagination. Only countryCode is required (defaults: departures in the next 2 months, 7 nights, 2 adults). Read-only.",
      "inputSchema": {
        "properties": {
          "adults": {
            "default": 2,
            "description": "Number of adults (default: 2)",
            "type": "integer"
          },
          "childrenAges": {
            "default": null,
            "description": "Ages of children (optional, empty array if no children)",
            "items": {
              "type": "integer"
            },
            "type": "array"
          },
          "countryCode": {
            "description": "Two-letter destination country code (e.g. 'ES' for Spain, 'GR' for Greece, 'TR' for Turkey, 'EG' for Egypt), as listed by get_countries.",
            "type": "string"
          },
          "cursor": {
            "default": null,
            "description": "Cursor for pagination (from previous response's nextCursor)",
            "type": "string"
          },
          "dateFrom": {
            "default": "",
            "description": "Earliest departure, YYYY-MM-DD (optional, defaults to tomorrow). With dateTo, the window the whole trip must fit in.",
            "type": "string"
          },
          "dateTo": {
            "default": "",
            "description": "Latest return date, YYYY-MM-DD (optional, defaults to 2 months from now). At least the minimum nights after dateFrom; a shorter window is rejected.",
            "type": "string"
          },
          "departureAirport": {
            "default": null,
            "description": "Departure airport IATA code (e.g. 'WAW' or 'KTW' on eSky, 'MAN' or 'LGW' on Thomas Cook UK). Omitted = all available departure airports.",
            "type": "string"
          },
          "limit": {
            "default": null,
            "description": "Number of results to return (default 6, max 30)",
            "type": [
              "integer",
              "null"
            ]
          },
          "maxPrice": {
            "default": null,
            "description": "Maximum price in the local currency (optional)",
            "type": [
              "number",
              "null"
            ]
          },
          "maxStars": {
            "default": null,
            "description": "Maximum hotel star rating 1-5 (optional)",
            "type": [
              "integer",
              "null"
            ]
          },
          "mealType": {
            "default": null,
            "description": "Meal plan filter: 'breakfast' (BB), 'half-board' (HB), 'full-board' (FB), 'all-inclusive' (AI), or 'room-only' (RO)",
            "type": "string"
          },
          "minPrice": {
            "default": null,
            "description": "Minimum price in the local currency (optional)",
            "type": [
              "number",
              "null"
            ]
          },
          "minStars": {
            "default": null,
            "description": "Minimum hotel star rating 1-5 (optional)",
            "type": [
              "integer",
              "null"
            ]
          },
          "nights": {
            "default": 7,
            "description": "Number of nights (default: 7)",
            "type": "integer"
          },
          "nightsMax": {
            "default": null,
            "description": "Maximum number of nights of a flexible range (optional, together with nightsMin). When set, 'nights' is ignored.",
            "type": [
              "integer",
              "null"
            ]
          },
          "nightsMin": {
            "default": null,
            "description": "Minimum number of nights of a flexible range (optional, together with nightsMax). When set, 'nights' is ignored.",
            "type": [
              "integer",
              "null"
            ]
          },
          "regionCode": {
            "default": null,
            "description": "Optional region or city code from get_regions for the same countryCode (e.g. 're-ACA'); a code of another country is rejected. Narrows the search.",
            "type": "string"
          },
          "sortBy": {
            "default": null,
            "description": "Sort results by: 'popularity' (default, most booked first), 'price', 'rating', or 'stars'.",
            "type": "string"
          },
          "sortOrder": {
            "default": null,
            "description": "Sort order: 'asc' (ascending) or 'desc' (descending). Default depends on sort type.",
            "type": "string"
          }
        },
        "required": [
          "countryCode"
        ],
        "type": "object"
      },
      "name": "search_packages"
    }
  ]
}

What the leaf hashes

{"body":"45950fe15d1c492f77fa831530af9bdc9417f6064a4c1a51534a8199205ea29c","id":2539370,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793686718964264,"prev":null,"subject":"012f4e4b-ff13-4971-bc47-9dba6fd6ba4a","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-03 (425475 rows).

1. 0xe43099662190098d9d7e35335ee66bba27663a6f63dc5484a1e6b2c0f4d94f14
2. 0x9b4ac35ca038c1ed99a8b55531a317abc31b4b20a4e105adad0083e4bcc7116d
3. 0x9270ff015afe8c72ca07e93312a2352ec370925ee1353bb6bfb49cc44c409d41
4. 0x2a2b1afcbb686cd7330c4f721940be349c51621b7e16c7f56974672973a799ad
5. 0x95588baf980cb8f5d6a762fc32c2a4a370b62d84dc387569583c2fff91d48020
6. 0x2b2aeb471e8794398a55463a2d77a8f1a21bbef060cdf4096fbb9dc420c4af3d
7. 0x7ba4dda253f474c88ab388a9ba0f07adbb10129f7afe3b661ab734e70d76e9bb
8. 0xa8419f59ad923f8e6e0d3628712579059c7905756d0a2afed2ef5cbbb452d88e
9. 0xfb1221d652dc9d2976682d37291c7f9ae827c66790b04ba631bacf1dfcea4e29
10. 0xc2080293c028c9e4444d7791fc9661dd26419807c99fece58a575ab8caf7f274
11. 0x83afa8fe3cc064d8448370921ed67d6d4b3967f53c7f58b39256c81a304a9a30
12. 0x8a2b27ce9e13b66cef6d1fa09c15a96f8e498f7102ac3524efaae6737b11d546
13. 0x45ba4607b58bd503d8501bd96a0477f9bb52f44b7e9c7927ec982f240f262131
14. 0x88002651b75eed5296ce4ff2e29616d59737fbfdbd4eb1747342b2df0368963a
15. 0x006ca23845a42a2d7f3ffca485568321f0deef0a65ff45709711a78f8e68aa0f
16. 0x68c6b9053bb76224fd0e15585b411d440e30609e5a4fb17301a7d24e9b177e60
17. 0x7075a090980aecb33e9c15c829cb40f5b44385b6d91a159042263db068126b87
18. 0xac5402954216dc6c7020a6405675c8fc3b0828c2ab02943d80de52677a2f1fc3
19. 0x85f3a27c16056a361d9ba33355a575ca7123f86de901b204c88953c4b8ea441a

Day root

0xb646ffa569e24bf8336b0a15a9d98d0a2f1239f58e10c2b18a9d22e43343566a

Chained

0x35e926359fd19031c6b5e08fb3b44f2524386a57c8fdd353336c185603f53d43

Published

On Arc Testnet, block 70601990: 0xa5f9dadba13cde129126b950e64b815e6833cb8ff53b75026c9dbe769c3768c7