Evidence row 579784

What was observed

{
  "count": 2,
  "tools": [
    {
      "description": "Return the description and install snippets for a named tool or server. For tools: the description, owning server, and connection metadata. For either kind: local (stdio, via npx) install snippets for every published server, plus remote (HTTP) connection snippets when a hosted endpoint exists — for every supported client, or one client via the client parameter.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "additionalProperties": false,
        "properties": {
          "client": {
            "description": "Return install snippets for this client only (both local and remote transports when available). \"streamable-http\" selects the generic mcpServers JSON; \"curl\" selects a connectivity probe for hosted servers. Omit to return snippets for all supported clients.",
            "enum": [
              "claude-code",
              "cline",
              "codex",
              "cursor",
              "curl",
              "gemini",
              "streamable-http"
            ],
            "type": "string"
          },
          "kind": {
            "description": "Whether name refers to a tool or server. Omit to auto-detect: names containing underscores are treated as tools; names containing hyphens are treated as servers.",
            "enum": [
              "tool",
              "server"
            ],
            "type": "string"
          },
          "name": {
            "description": "Tool name (snake_case, e.g. \"earthquake_search_events\") or server name (kebab-case, e.g. \"earthquake-mcp-server\"). 1-64 characters. Exact names win; unique case-insensitive names resolve to canonical names. A tool name that more than one server owns also needs server. Use cyanheads_search_catalog to discover valid names.",
            "maxLength": 64,
            "minLength": 1,
            "type": "string"
          },
          "server": {
            "description": "Server that owns the tool to describe — the server value cyanheads_search_catalog returned with this name. 1-64 characters, resolved like a server name. Required when the tool name has more than one owner; with a server name, it must name the same server.",
            "maxLength": 64,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "name"
        ],
        "type": "object"
      },
      "name": "cyanheads_describe_entry"
    },
    {
      "description": "Search fleet tools and servers by natural-language description. Returns ranked matches with brief summaries and the server each tool belongs to. Use scope \"servers\" to find which server handles a workflow; use the default scope \"tools\" to find specific tools.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "additionalProperties": false,
        "properties": {
          "category": {
            "description": "Filter by catalog category. Omit to search all categories.",
            "enum": [
              "research",
              "government",
              "public-data",
              "utility"
            ],
            "type": "string"
          },
          "limit": {
            "default": 5,
            "description": "Maximum number of results to return (1-1000). Default 5. At most 20 per call: a larger limit returns up to 20, with a notice naming the offset to continue from when more matches follow.",
            "maximum": 1000,
            "minimum": 1,
            "type": "integer"
          },
          "offset": {
            "default": 0,
            "description": "Result offset. Use nextOffset with the same query, scope, category, and limit; pages use the current catalog.",
            "maximum": 9007199254740991,
            "minimum": 0,
            "type": "integer"
          },
          "query": {
            "description": "Natural language search query. Describe what you want to accomplish, a workflow, or a capability area. 1-500 raw characters; surrounding whitespace is trimmed. Must contain non-whitespace text.",
            "maxLength": 500,
            "minLength": 1,
            "pattern": "\\S",
            "type": "string"
          },
          "scope": {
            "default": "tools",
            "description": "What to search. \"tools\" returns individual tool matches; \"servers\" returns server-level matches.",
            "enum": [
              "tools",
              "servers"
            ],
            "type": "string"
          },
          "serversOffset": {
            "default": 0,
            "description": "Independent server roll-up offset (10 per page). Use nextServersOffset; must be zero in servers scope.",
            "maximum": 9007199254740991,
            "minimum": 0,
            "type": "integer"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "cyanheads_search_catalog"
    }
  ]
}

What the leaf hashes

{"body":"1f8322ac1c9d580d32e48928c0fd680f343117a96f3dbacc8db6288d44f67d6e","id":579784,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793143553072196,"prev":null,"subject":"573e1d0c-a5d2-4a14-8842-21f983ce3791","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. 0xf915832605cbf5223eb11d518c5963e9a68560de889f3d93295695bbb217d968
2. 0x92673c4ba1c4ef89cad1e6a1e0e0d414e2d9fcd1468b16ca12277039c5ec2971
3. 0x26bec472c230858af42560bfbc6e86e44a3aa809f1bead156a9a919e7e94b7d1
4. 0xdeecf1962d0bda4aa80996b2483311e72760623faa7c920d8e4607fbaff222bd
5. 0x2285f2438612600d111903eb0d7b230075b098c66c96b9411423b08d6b0fb7d6
6. 0x205af9e8f0e62b4e334820636a4fceebb788aaba040136332b3f3cae7ee3d352
7. 0xd919072942ee9a9d256ea11b92569dc14b7c8557ff54b23c0e275904b99bc084
8. 0x7bb5e32827829233303255741e93655d61f257e1374f3cd4e0f14a232848a223
9. 0x6a99993e00baf2e6e53a0e7854781834f253539f677d28a6e895b9255ec7a6f1
10. 0xb216d7be3719888c5905d4d551a416130bdb347b2c87c55396c45675287fdff5
11. 0x0910ffa4c5b68bfeab876c95d437a268cbe3ce3065ac289e0ccc44dd931c928a
12. 0x3d6ce9e9447d644baa93c05c5ec0a44778000bfa82e0208f4a0086c782198964
13. 0x2cba9be288dab78cb9c5f54fa13242712b2493da9f833a7c3cdd92cde60662b0
14. 0x94d3785ce9330e4580bccada5459380aa2aac76a0bf11354d1353b375afc17d2
15. 0xb5b652bba4a5afca56c21031d89b1c06361563aaf54ccc8541c296ceeb2b66fa

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4