Evidence row 561617

What was observed

{
  "count": 3,
  "tools": [
    {
      "description": "Free, no API key required. Describes the US WARN Act layoff dataset: what a WARN notice is, which states are covered, how many notices and workers, per-state freshness, known coverage gaps, the schema of a record, and how to obtain an API key. Returns no records. Call this before search_layoff_notices to decide whether the data is useful.",
      "inputSchema": {
        "properties": {},
        "title": "describe_datasetArguments",
        "type": "object"
      },
      "name": "describe_dataset"
    },
    {
      "description": "Per-state coverage of the WARN corpus: how many notices are held for each state and the most recent dates. Use it to check freshness before relying on a search result. Requires an API key.",
      "inputSchema": {
        "properties": {},
        "title": "layoff_coverage_statsArguments",
        "type": "object"
      },
      "name": "layoff_coverage_stats"
    },
    {
      "description": "Search US WARN Act mass-layoff and plant-closing notices by state, employer name, effective date range, and county/location. Returns structured records: employer, workers impacted, effective date, notice filing date, location, layoff type, and a provenance key. Useful for layoff tracking, corporate distress and alternative-data signals, employment-law and WARN-compliance research, and recruiting or outplacement leads. Requires an API key.",
      "inputSchema": {
        "properties": {
          "company": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "title": "Company"
          },
          "end_date": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "title": "End Date"
          },
          "limit": {
            "default": 100,
            "title": "Limit",
            "type": "integer"
          },
          "location": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "title": "Location"
          },
          "offset": {
            "default": 0,
            "title": "Offset",
            "type": "integer"
          },
          "start_date": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "title": "Start Date"
          },
          "state": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "title": "State"
          }
        },
        "title": "search_layoff_noticesArguments",
        "type": "object"
      },
      "name": "search_layoff_notices"
    }
  ]
}

What the leaf hashes

{"body":"7e9f5aa6fdd42a6d8198606a5cae0efb4f04b0d7d588f158a1f9b5dec0a45d94","id":561617,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793137225900851,"prev":null,"subject":"871fe8f2-82c3-4022-b64c-a2e9a5d292b2","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x32e9d47b65ec7539f00735f0a6b7b78bb8399e01ab1a4d3d8846aec6c0471456
2. 0x2fb4bab85a5c9350cf8bfc93d6f56a39e88c5e1460b9beebf48752e95183bda0
3. 0xfc685d0fdec907003bfb625254769679124e4e39b47a2e38031c51bc2f735179
4. 0x04a7be2f8397f0887c73584752b472f660111b89142dc1cdc09bdaf595a0942e
5. 0x139c6791fc303dcb0713332e79cd8b7f98f885b2cea2835c70dd6e7d9b6377e9
6. 0x8ca04cbf73b4447720fdeac00aa63a19e71d1594bab4693174ded2d259d1e4c2
7. 0x4c6532087ee145c6efd7755635f8994dd12161cdc4a7d7f35e4970d5eed1220d
8. 0x7d28783f3fd86d51a8a74b0b9eadee889a9e008877278efd72eba4569e61a443
9. 0x47514bafeb0f2a889d8ce88387969db4846d45bbdf29a13c81f1bcf801b5ba38
10. 0x59ec49ef8e6a7a58e3dbdfe3168882698cf6df297e6678919969944784a11457
11. 0xd6abb3506644ba991806affe480eff2c10a097a3451e0656bd8c5eb07a497205
12. 0x7c26e7a3f70416cc7cabc8e770eba81b50b410fc94aaae40ac450b47b34edecc
13. 0x5a83a2d5b2abb340c16172caf3ef83b831e168d2e94e4154a4ad72adcac5cad2
14. 0x595de2dea3b8fa56dbd6142dd78ae79f3e7169c631e41a844b100613abb3e430
15. 0x8360ee1105e4d9f9312067cbbfd47c69c5948665ae582b9684a580c8f4e199e1
16. 0x52efa60e0c3d8525486d2310eb3b6b566c9677c64fd1f819edb072cf101bcbdb
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4