Evidence row 299747

What was observed

{
  "count": 8,
  "tools": [
    {
      "description": "Find airport IATA codes for a city. Returns nearby airports and common codes.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "city": {
            "description": "City name (e.g., 'London', 'New York', 'Tokyo')",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "airport_hub"
    },
    {
      "description": "Find the cheapest flights across a full month. Returns price-sorted options with dates, airlines, and price insights.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "arrival": {
            "description": "Arrival airport IATA code",
            "type": "string"
          },
          "country": {
            "description": "Country code (default: us)",
            "type": "string"
          },
          "currency": {
            "description": "Currency code (default: USD)",
            "type": "string"
          },
          "departure": {
            "description": "Departure airport IATA code",
            "type": "string"
          },
          "month": {
            "description": "Month to search YYYY-MM (e.g., 2026-06)",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "cheapest_flights"
    },
    {
      "description": "Search round-trip or one-way flights between airports. Returns best flights, prices, airlines, duration, stops, and carbon emissions.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "adults": {
            "description": "Number of adult passengers (default: 1)",
            "type": "integer"
          },
          "arrival": {
            "description": "Arrival airport IATA code (e.g., LHR, CDG, NRT)",
            "type": "string"
          },
          "country": {
            "description": "Country code for local pricing (default: us)",
            "type": "string"
          },
          "currency": {
            "description": "Currency code (default: USD)",
            "type": "string"
          },
          "date": {
            "description": "Outbound date YYYY-MM-DD",
            "type": "string"
          },
          "departure": {
            "description": "Departure airport IATA code (e.g., JFK, LAX, FRA)",
            "type": "string"
          },
          "return_date": {
            "description": "Return date YYYY-MM-DD (omit for one-way)",
            "type": "string"
          },
          "stops": {
            "description": "0=any, 1=nonstop only, 2=max 1 stop, 3=max 2 stops (default: 0)",
            "type": "integer"
          },
          "travel_class": {
            "description": "1=Economy, 2=Premium Economy, 3=Business, 4=First (default: 1)",
            "type": "integer"
          }
        },
        "type": "object"
      },
      "name": "flight_search"
    },
    {
      "description": "Server status, API connectivity, supported features.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "health_check"
    },
    {
      "description": "Price a multi-city route with 2+ legs. Returns per-leg pricing and total cost range.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "country": {
            "description": "Country (default: us)",
            "type": "string"
          },
          "currency": {
            "description": "Currency (default: USD)",
            "type": "string"
          },
          "legs": {
            "description": "List of legs: [{departure, arrival, date}, ...] (min 2)",
            "items": {
              "type": "object"
            },
            "type": "array"
          }
        },
        "type": "object"
      },
      "name": "multi_city"
    },
    {
      "description": "Search one-way flights with all filters.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "adults": {
            "description": "Passengers (default: 1)",
            "type": "integer"
          },
          "arrival": {
            "description": "Arrival IATA code",
            "type": "string"
          },
          "country": {
            "description": "Country (default: us)",
            "type": "string"
          },
          "currency": {
            "description": "Currency (default: USD)",
            "type": "string"
          },
          "date": {
            "description": "Date YYYY-MM-DD",
            "type": "string"
          },
          "departure": {
            "description": "Departure IATA code",
            "type": "string"
          },
          "stops": {
            "description": "0=any, 1=nonstop, 2=1stop, 3=2stops",
            "type": "integer"
          },
          "travel_class": {
            "description": "1=Economy, 2=Premium, 3=Business, 4=First",
            "type": "integer"
          }
        },
        "type": "object"
      },
      "name": "one_way_search"
    },
    {
      "description": "Weekly price calendar for a route. Find the cheapest week to fly.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "arrival": {
            "description": "Arrival IATA code",
            "type": "string"
          },
          "country": {
            "description": "Country (default: us)",
            "type": "string"
          },
          "currency": {
            "description": "Currency (default: USD)",
            "type": "string"
          },
          "departure": {
            "description": "Departure IATA code",
            "type": "string"
          },
          "start_date": {
            "description": "Start date YYYY-MM-DD",
            "type": "string"
          },
          "weeks": {
            "description": "Number of weeks to scan (1-8, default: 4)",
            "maximum": 8,
            "minimum": 1,
            "type": "integer"
          }
        },
        "type": "object"
      },
      "name": "price_calendar"
    },
    {
      "description": "Compare flight prices by airline for a route. Shows cheapest per airline, stops, duration.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "arrival": {
            "description": "Arrival IATA code",
            "type": "string"
          },
          "country": {
            "description": "Country (default: us)",
            "type": "string"
          },
          "currency": {
            "description": "Currency (default: USD)",
            "type": "string"
          },
          "date": {
            "description": "Date YYYY-MM-DD",
            "type": "string"
          },
          "departure": {
            "description": "Departure IATA code",
            "type": "string"
          },
          "return_date": {
            "description": "Return date (optional)",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "route_compare"
    }
  ]
}

What the leaf hashes

{"body":"3f859cbd66ce15d13e41e00744fc14be941367e2430f2a3d85467b2e152f46ef","id":299747,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793053072880152,"prev":null,"subject":"fd83159d-52d6-4173-8d8f-c0ea4cc457ca","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. 0x7cbc5b6bd264f89bf1cf4e82dae4383896853de0d992042208a29ef5dd105464
2. 0x503b78bbe4e36781ae8f912be01ea9b776cdf53f831e3e81e36220804aeb5fe2
3. 0x3207f9d7ebaaf01247d6a8e7bc61133cb429a47713ee834be0e0658eefb50c67
4. 0x351a2b0e75ec52e9f01b5ac8a1f37b945e62cebd3be7db6ef885affeffa701e9
5. 0x46e59be27a655732443c7ca5dd53650e3c6ff7fc698d19953f12b81c469ae975
6. 0xf1717953972400870aa08d4c3853b7399a05529cb466aea8132ca2a06faae1eb
7. 0x801745f5ab0105a3742f1eace24f4f94abd01b6a5e69f3a1c9ef2a7eb1c93e29
8. 0xbc95e5969ad85e8a0b03139c83f007745cecb6b43af6c7f4e04bd358d4205bdc
9. 0x4a59d37e87bfd6c1a73e2e46dcb996811787999807c2354410bd4889fc4c24ba
10. 0xf0ed0e925a8a7da0329fe426ca59f504fc92f30b2f6f61a5828a859ff9cdb816
11. 0x05b818019343d04f2973b36329a447f88301721891653961b94822610edda553
12. 0x779c77295186b32da6387dfb36d3a76522e7d713472a7cebed7c93529ccc4be6
13. 0x0bffb634300aa5609bddaa79e8d31d7cde36c0a5a4465472f809b9f5287e40d2
14. 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae