Evidence row 730234

What was observed

{
  "count": 5,
  "tools": [
    {
      "description": "Call BEFORE designing or building any interactive component or screen: menus, dialogs, carousels, tabs, forms, drag and drop, custom controls, cards, tables, charts, animation. This includes wireframes, mockups and prototypes. Takes the request in the user’s own words and returns the guides that apply with the requirements to build in from the start (keys, roles and names, focus, what is announced), working reference code, and the checks split into what the agent can confirm and what a person must. When the request itself breaks a rule (autoplay with no pause, a placeholder as the only label, a div as a button, hover-only menus, removed focus outlines, disabled zoom), it returns a version that keeps what the user wanted and passes, plus one sentence to say to the user. Do not refuse such a request, and do not build the failing version quietly.",
      "inputSchema": {
        "properties": {
          "limit": {
            "description": "Guides to return at most (default 6, max 12)",
            "type": "integer"
          },
          "locale": {
            "description": "Language of the answer and the guides: en (default) or ja. Japanese answers cite JIS X 8341-3:2016.",
            "enum": [
              "en",
              "ja"
            ],
            "type": "string"
          },
          "request": {
            "description": "What the user asked for, in their words, e.g. \"autoplaying hero carousel\", \"custom dropdown with search\", \"カード全体をクリックできる一覧\"",
            "maxLength": 1000,
            "type": "string"
          }
        },
        "required": [
          "request"
        ],
        "type": "object"
      },
      "name": "before_building"
    },
    {
      "description": "Call when choosing or changing colours, a palette or design tokens, before they are used in a design or in code. Takes colour pairs (foreground and background, with text size in px and weight when the foreground is text, or use: \"non-text\" for control borders, icons and focus rings) or a set of named tokens, in hex, rgb() or hsl(). Returns each pair’s contrast ratio, pass or fail against WCAG 1.4.3 (text) and 1.4.11 (non-text) at AA or AAA, the nearest passing shade of the same hue, and the guides that apply. It checks values, not rendered pages: text over images, real focus states and forced colors stay with the audit.",
      "inputSchema": {
        "properties": {
          "level": {
            "description": "Conformance level to check against (default AA)",
            "enum": [
              "AA",
              "AAA"
            ],
            "type": "string"
          },
          "locale": {
            "description": "Language of the answer and the guides: en (default) or ja. Japanese answers cite JIS X 8341-3:2016.",
            "enum": [
              "en",
              "ja"
            ],
            "type": "string"
          },
          "pairs": {
            "description": "Colour pairs to check",
            "items": {
              "properties": {
                "background": {
                  "description": "What it sits on",
                  "type": "string"
                },
                "foreground": {
                  "description": "Text, icon or border colour: #767676, rgb(118 118 118), hsl(0 0% 46%)",
                  "type": "string"
                },
                "name": {
                  "description": "What the pair is, e.g. \"body text\", \"primary button border\"",
                  "type": "string"
                },
                "size": {
                  "description": "Font size in CSS px, when the foreground is text",
                  "type": "number"
                },
                "use": {
                  "description": "text (default), large-text, or non-text for control boundaries, icons and focus indicators (3:1)",
                  "enum": [
                    "text",
                    "large-text",
                    "non-text"
                  ],
                  "type": "string"
                },
                "weight": {
                  "description": "Font weight (400, 700), when the foreground is text",
                  "type": "number"
                }
              },
              "required": [
                "foreground",
                "background"
              ],
              "type": "object"
            },
            "maxItems": 50,
            "type": "array"
          },
          "tokens": {
            "additionalProperties": {
              "type": "string"
            },
            "description": "Or named tokens { \"ink\": \"#1b1b1b\", \"paper\": \"#fff\" }, up to 12; every combination is checked as text",
            "type": "object"
          }
        },
        "type": "object"
      },
      "name": "check_palette"
    },
    {
      "description": "Search the Learn guides by words, component name, tag, ARIA attribute or WCAG number (1.4.3, SC 2.1.1, JIS 達成基準, EN 301 549 9.x). Returns for each matching topic: the problem, the fix in one line, how to test it, the guide link, and the criterion in WCAG, EN 301 549, Section 508 and JIS X 8341-3 terms. Topics with no guide yet come back as \"in progress\". Use it when a finding, a complaint, a failing check or a question names a problem.",
      "inputSchema": {
        "properties": {
          "limit": {
            "description": "Topics to return at most (default 8, max 20)",
            "type": "integer"
          },
          "locale": {
            "description": "Language of the answer and the guides: en (default) or ja. Japanese answers cite JIS X 8341-3:2016.",
            "enum": [
              "en",
              "ja"
            ],
            "type": "string"
          },
          "query": {
            "description": "Words, a tag, an ARIA attribute or a WCAG number",
            "maxLength": 200,
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "find_fix"
    },
    {
      "description": "The full guide as Markdown, the same as easeweb.dev/learn/<slug>.md: what happens, why it fails, who it affects, what automation misses, the Before and After code, how to verify, and the limits. Also returns the After code as plain text with its marks (recommended, not enough on its own, the rule of thumb behind it). Get the slug from find_fix or before_building.",
      "inputSchema": {
        "properties": {
          "locale": {
            "description": "Language of the answer and the guides: en (default) or ja. Japanese answers cite JIS X 8341-3:2016.",
            "enum": [
              "en",
              "ja"
            ],
            "type": "string"
          },
          "slug": {
            "description": "The guide slug, e.g. \"native-buttons\"",
            "maxLength": 100,
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "type": "object"
      },
      "name": "get_guide"
    },
    {
      "description": "Call AFTER building or fixing something, and before telling the user it is done. For a guide (by slug) or a component (by query) returns the pass criteria, the checks the agent can run itself, the checks only a person can do (which keys to press and what should happen, as a two-minute script), the guide’s limits, and a Playwright regression test skeleton. Hand the person’s checks to the user as written; never report them as done.",
      "inputSchema": {
        "properties": {
          "locale": {
            "description": "Language of the answer and the guides: en (default) or ja. Japanese answers cite JIS X 8341-3:2016.",
            "enum": [
              "en",
              "ja"
            ],
            "type": "string"
          },
          "query": {
            "description": "Or a component or problem in words, when the slug is unknown",
            "maxLength": 200,
            "type": "string"
          },
          "slug": {
            "description": "A guide slug from find_fix or before_building",
            "maxLength": 100,
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "test_steps"
    }
  ]
}

What the leaf hashes

{"body":"6d6f7ddd755a2e0a54f29788d5dce4fce8839286e70d22d7b77b4f46dccba892","id":730234,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793153740626397,"prev":null,"subject":"e2627fcc-4ee8-4e77-b095-faaaa5e6e2f2","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-28 (231336 rows).

1. 0x2f2ed06026c3c4299e01ee309909c9041a268fdc2bee8413442e98d711f13745
2. 0xe18493557b5de9cbae6c497f411630cc392c841c7db4e74d6ecacc6b73f63200
3. 0x1d8c338acb55f741d005e8ef73b963d9e05da885b877d82862068545161fdc18
4. 0x411e9d3e5899564877e7b0da24665f331e9504836bbba94aafd8eeb192c7b1dc
5. 0xa67f8ef659d712ef2106a842029e7965ed00830de8d95fd364e9b535526441e8
6. 0xb2c0ee581d821e2e49802758c00aea3375ff10070f5dca13a3176ac06b50f367
7. 0x50f5ec8bcc879511859525b8bc2264ace00f636c644bb1f47a1b436b2dd51036
8. 0xe6e037e92f6156d59c4727aa1fd62af1639b78f5b3848b5daba78c0deccd5486
9. 0x313d72c4e81c52fee99f15a95a25930d29a96b5ca08daf389ef989f2db01056f
10. 0xad715e4905fcfca3abb611a685a0a7143bbab97608234776db71eb3cf61d61c3
11. 0x5177a90fe1db35842c16715c6853f0eebf60d23fa47c98ab0125cd2db0a27032
12. 0x0383fe3255c79fb178376a593551d0aefd8c75bd939df4c4f78d5b4cddb8108a
13. 0x812d7bac70bc08f291fb19afa5eb8416c90a0b364e6f03602654beab04a997ad
14. 0xa96695bb231e3cabeb4f03cab216cc6730b71e2304bf5be1e6c0447ea577aae6
15. 0x8d500b42a7bdba5e17ebd9e6a404f2de5260cf3420865b41e7de8c69434ce413
16. 0xaeb1503e5d0d358b256ba97a10178c357ddb8f55cc961925ccf0458aae5ebcae
17. 0xf078ea7d84d98dbeffed23d8e67b36751e60464ffd4cfdc005e0aa6f8cb9b459
18. 0xe027395fafb7fc41921c42ca0542524ea22204cbd5908b70b27f3d5fb26f5d0f

Day root

0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e

Chained

0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be

Published

On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae