Evidence row 565157

What was observed

{
  "count": 6,
  "tools": [
    {
      "description": "Computes the exact WCAG 2.1 contrast ratio between a foreground and background color (relative-luminance formula) and reports AA/AAA pass-fail for normal text (4.5 / 7), large text (3 / 4.5), and UI components (3).",
      "inputSchema": {
        "properties": {
          "background": {
            "description": "Background color. Color in any supported notation: hex (#F43, #FF6347, #FF6347CC), rgb()/rgba(), hsl()/hsla(), a CSS named color (tomato), or a Tailwind token (red-500).",
            "type": "string"
          },
          "foreground": {
            "description": "Foreground (text) color. Color in any supported notation: hex (#F43, #FF6347, #FF6347CC), rgb()/rgba(), hsl()/hsla(), a CSS named color (tomato), or a Tailwind token (red-500).",
            "type": "string"
          }
        },
        "required": [
          "foreground",
          "background"
        ],
        "type": "object"
      },
      "name": "check_contrast"
    },
    {
      "description": "Converts a color into code for 12 formats: HEX, HEX8, rgba(), hsla(), closest CSS named color, closest Tailwind class, SwiftUI Color, UIColor, Jetpack Compose, Android XML, Flutter, and React Native. Applies each platform's alpha byte order (RRGGBBAA on the web, AARRGGBB on Android/Compose/Flutter).",
      "inputSchema": {
        "properties": {
          "alpha": {
            "description": "Opacity 0–1. Overrides any alpha embedded in the color input. Defaults to the input's alpha, or 1.",
            "maximum": 1,
            "minimum": 0,
            "type": "number"
          },
          "color": {
            "description": "Color in any supported notation: hex (#F43, #FF6347, #FF6347CC), rgb()/rgba(), hsl()/hsla(), a CSS named color (tomato), or a Tailwind token (red-500).",
            "type": "string"
          }
        },
        "required": [
          "color"
        ],
        "type": "object"
      },
      "name": "convert_color"
    },
    {
      "description": "Converts between Unix epoch timestamps and human-readable dates. Accepts epoch seconds / milliseconds / microseconds (auto-detected by magnitude), ISO 8601 / RFC 2822 strings, or \"now\". Returns seconds, millis, micros, ISO 8601 UTC, RFC 7231 UTC, the wall-clock time in a requested IANA timezone, and a relative description.",
      "inputSchema": {
        "properties": {
          "input": {
            "description": "Epoch timestamp (e.g. \"1735689600\", \"1735689600000\"), ISO 8601 / RFC 2822 date string, or \"now\".",
            "type": "string"
          },
          "timezone": {
            "description": "IANA timezone for the wall-clock output (e.g. \"Asia/Seoul\"). Default UTC.",
            "type": "string"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      },
      "name": "convert_timestamp"
    },
    {
      "description": "Generates cryptographically random UUIDs: v4 (random), v7 (RFC 9562 time-ordered; batches stay strictly ordered), or NIL. Supports uppercase, hyphen-less, and braced formatting. 1–100 per call.",
      "inputSchema": {
        "properties": {
          "braces": {
            "description": "Wrap in braces. Default false.",
            "type": "boolean"
          },
          "count": {
            "description": "How many UUIDs to generate (1–100). Default 1.",
            "maximum": 100,
            "minimum": 1,
            "type": "integer"
          },
          "hyphens": {
            "description": "Keep hyphens. Default true.",
            "type": "boolean"
          },
          "uppercase": {
            "description": "Uppercase output. Default false.",
            "type": "boolean"
          },
          "version": {
            "description": "UUID version. Default v4.",
            "enum": [
              "v4",
              "v7",
              "nil"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "generate_uuid"
    },
    {
      "description": "Computes MD5, SHA-1, SHA-256, SHA-384, and SHA-512 digests of a UTF-8 string, or HMAC variants when a key is given (HMAC-MD5 unsupported). Stateless; input is not stored.",
      "inputSchema": {
        "properties": {
          "hmac_key": {
            "description": "Optional HMAC key. When set, outputs are HMAC digests.",
            "type": "string"
          },
          "text": {
            "description": "Text to hash (UTF-8).",
            "type": "string"
          }
        },
        "required": [
          "text"
        ],
        "type": "object"
      },
      "name": "hash_text"
    },
    {
      "description": "Generates every SwiftUI Color initializer for a color: Color(red:green:blue:), opacity variant, Color(.sRGB), Color(.displayP3), HSB, hex-extension call, #colorLiteral, UIColor/NSColor bridges — plus a reusable `extension Color` snippet and Asset Catalog Contents.json.",
      "inputSchema": {
        "properties": {
          "alpha": {
            "description": "Opacity 0–1. Defaults to the input's alpha, or 1.",
            "maximum": 1,
            "minimum": 0,
            "type": "number"
          },
          "color": {
            "description": "Color in any supported notation: hex (#F43, #FF6347, #FF6347CC), rgb()/rgba(), hsl()/hsla(), a CSS named color (tomato), or a Tailwind token (red-500).",
            "type": "string"
          },
          "name": {
            "description": "Optional swatch name for the `extension Color` snippet (e.g. \"Brand Primary\" → `Color.brandPrimary`).",
            "type": "string"
          }
        },
        "required": [
          "color"
        ],
        "type": "object"
      },
      "name": "swiftui_color"
    }
  ]
}

What the leaf hashes

{"body":"7598b5a80f42c3a6d85d2db6677f68ec95be8fd6e5659d7277fcbfc15ed480be","id":565157,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793138046112728,"prev":null,"subject":"b1140eb9-35ca-4c44-9b68-b4a66eb18621","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. 0x7934cf89c27bf1175ada5764f0b06bf54a1ab8e373ad5731a29d22ce79b31f5d
2. 0x0d68fab35f590871707977f97ea5c6485fcead7a3dc096e53c1a5666abd4ee9c
3. 0x7c66aaf8133c3879e0892e33159fafd199b38b531a0e601efa92d5577f6dc03a
4. 0x568413e756ec15eb6d37f1aeb3389478c2469de1a75962ffc58ac0c2385669aa
5. 0xb7e12a844ec282446e9bf71b337a3e827604aab412962efcb59599dbef14d497
6. 0x55188a5e3b9e7fbf5e70f1099cd1416b115bc739a561c814b2266e21428dba86
7. 0xb9970f0b818166159a3ae58da01b8df08f633a7bf19dee027ef9a5e9cc13be07
8. 0x5f1993637e41f7c0ff81a4594901d5bf95a35b5d5a5f0b08146c3d8f9c4ca32c
9. 0x596688c2246b5bbc40b7ca47a22316b1bf5f3f0e294bfac0b87456f4936ac1c9
10. 0xf3e7a31ee93ed924f1bd85ed728376ed1fab50ff54ebc7726e59e55658112aa3
11. 0xa1e6e989ecb6e1c43313ac525ace9dc4656b12fbac67512d19580139784350ab
12. 0x30b0c1fa0ae50435d58b5b7f993dde40a8bcc3f5956d7e3d31946f1a957684b4
13. 0x8f2d125f5fe55a24b5da16577766eeaa13f24a272bb4c1c016f423ae917da681
14. 0x9848c068b1371232529d2b5738fdc45b854c57da041b69ea7c9e112b14e2d9d1
15. 0x275720ecabb68df33eee92ae4fd70572a8d952d6c61c061c2869cfc3217aa5c5
16. 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4