Evidence row 2963772

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "Search USGS stream gauges nationwide by river and place name (for example \"mississippi st louis\", \"potomac little falls\"), by state, or within a radius of a latitude and longitude. Returns site numbers with whether each is reporting now and its latest stage and flow, active gauges first.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "latitude": {
            "description": "Latitude for a nearby search, for example 38.63.",
            "maximum": 90,
            "minimum": -90,
            "type": "number"
          },
          "longitude": {
            "description": "Longitude for a nearby search, for example -90.18.",
            "maximum": 180,
            "minimum": -180,
            "type": "number"
          },
          "query": {
            "description": "Words from the gauge name: river plus town, for example \"colorado river austin\". Words like river, at and near are ignored.",
            "maxLength": 80,
            "type": "string"
          },
          "radius_miles": {
            "description": "Radius for a latitude and longitude search, 1 to 100 miles. Default 15.",
            "maximum": 100,
            "minimum": 1,
            "type": "number"
          },
          "state": {
            "description": "Two-letter state code (MO) or full state name (Missouri).",
            "maxLength": 30,
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "find_river_gauges"
    },
    {
      "description": "The current NOAA National Water Prediction Service river forecast for a gauge: the forecast stage and flow series, the forecast crest with its flood category, the latest observation, flood stages and the record crest. Works for NWS forecast points (accepts the NWS id or the USGS site number). Forecasts are reissued several times a day.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "site": {
            "description": "USGS site number (for example \"07010000\" for the Mississippi River at St. Louis) or an NWS gauge id (for example \"EADM7\"). Use find_river_gauges to look one up.",
            "maxLength": 24,
            "minLength": 3,
            "type": "string"
          }
        },
        "required": [
          "site"
        ],
        "type": "object"
      },
      "name": "get_flood_forecast"
    },
    {
      "description": "Daily mean streamflow (default) or stage for a USGS gauge over the last 2 to 366 days, with first, last, low, high, mean and change. Use it for trend, drought and \"is the river rising\" questions. Many gauges publish daily means for discharge only.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "days": {
            "default": 30,
            "description": "Days back from today, 2 to 366. Default 30.",
            "maximum": 366,
            "minimum": 2,
            "type": "integer"
          },
          "parameter": {
            "default": "discharge",
            "description": "discharge (streamflow, ft3/s), gage_height (stage, ft) or water_temperature (deg C). Default discharge.",
            "enum": [
              "discharge",
              "gage_height",
              "water_temperature"
            ],
            "type": "string"
          },
          "site": {
            "description": "USGS site number (for example \"07010000\" for the Mississippi River at St. Louis) or an NWS gauge id (for example \"EADM7\"). Use find_river_gauges to look one up.",
            "maxLength": 24,
            "minLength": 3,
            "type": "string"
          }
        },
        "required": [
          "site"
        ],
        "type": "object"
      },
      "name": "get_river_history"
    },
    {
      "description": "Current river stage (gage height in feet), streamflow (discharge in cubic feet per second) and water temperature where measured, read now from a USGS stream gauge (readings every 5 to 60 minutes). Adds the NWS flood stages (action, minor, moderate, major), the current flood category, feet below flood stage and the record crest when the gauge is an NWS forecast point. Flags readings over 48 hours old. Your training data cannot know today's river level.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "site": {
            "description": "USGS site number (for example \"07010000\" for the Mississippi River at St. Louis) or an NWS gauge id (for example \"EADM7\"). Use find_river_gauges to look one up.",
            "maxLength": 24,
            "minLength": 3,
            "type": "string"
          }
        },
        "required": [
          "site"
        ],
        "type": "object"
      },
      "name": "get_river_level"
    }
  ]
}

What the leaf hashes

{"body":"544b384b92ad2c9abe4c48dcecab24a29da048d9654aa01447b85d35ded9ca17","id":2963772,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793774086513553,"prev":null,"subject":"cdbef965-4325-4875-a7f4-d81af4db472b","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-04 (424109 rows).

1. 0xc2ffb3fa4ba5a4a9a0243a014a48e29218764b37266035b80e50c8459bef121f
2. 0x4d0853799f1c6bfe72f8b16687071e9396cf051c1f6b420a0dad4541c86eecde
3. 0xc5c69aa16ae0ab4ffccb8722c328084bd858c25e0d74ae40166e63b6ee7b4204
4. 0xd79472513cae8d55a51a10c2ef2f10a1e52fe5f2b48090899d53f66b58a3ce1c
5. 0x30e3c229d61e6f636c95fe5086fdcb1b7080dc03c238ee9491b31816a91dd285
6. 0x02f0bcf4f6b3581a9ca8ec4f3ec0de59d87facf9ba3b7d9ad30ee8c7417ed284
7. 0x3c9936181a564886920a673ce32e2ab4eddb6e0b028078704221e45b49111d2a
8. 0x24194ae3d7fc09c84671483bd5af77dae674a7c3e89945f1b5b08215a6542346
9. 0x2151a0071ad267d84b8c5e808fb2d9bd2a147e71436121430264acc9cbee5541
10. 0xc773dba572e54fe3729ef11e1fc6d7ab56b092fcfe1834fc9aedf3949a07fd5f
11. 0x9384190dda9e6683ea60beafec69f1fc2ec2dc73a4b673b32249bade34070d05
12. 0x2900d6561397b30bc7a016ce717cdf6447c242043ea0fc545edddcd173b77fd4
13. 0xe7b21f48120e6d4513583acdfba815582ed80b35e3c9704c250a4cb03fc9e0d7
14. 0x274c9bc1ba12b05b3d744014d9ba00d9527c9865f98662174122dbc290b38d30
15. 0x5b8ce88213ec1f540b9f554b597f6fee893a9afa0156a79c8474549158b8ee5f
16. 0xa81588732e20541f1fd63a8674c3102204c511e11cd493c1ebf29abccd23069e
17. 0x321a352f90893ccd0656c1544d31825cd29cf74464e924a4ca7fb29b1f8ee0fd
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19. 0xbb1998892a86d9633ea7b5de06760114b45777da649c217062ff0d65d7095f34

Day root

0xd4eed8c0ea3c90ec6f262b19fcc3b849f30cb82a0f84b8b89569e48af7d0c1ee

Chained

0x59305749c32724a02a23c368834d8a36ae9908da93a915e2962fffe01b4e591b

Published

On Arc Testnet, block 70772483: 0x813d56041c1efd407e56047129b597b154a1cb26458bb2768fd0a4630ac97345