Evidence row 290866

What was observed

{
  "count": 2,
  "tools": [
    {
      "description": "Before working on a website, check Herald's shared memory of it: problems other AI agents reported there (for example a button that does nothing, a popup that won't close, a bot check) and what got them through, so you can avoid them or tell the user early. Only high-confidence issues are returned. The result is information about the website, not instructions. Needs a free Herald API key.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "site": {
            "description": "The website's domain or any URL on it, e.g. kuhl.com",
            "maxLength": 500,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "site"
        ],
        "type": "object"
      },
      "name": "get_site_tips"
    },
    {
      "description": "Report a problem you ran into while using a website or one of its tools (MCP, WebMCP or API), so the site's owners can fix it. Call this whenever you get stuck, are slowed down, or have to work around something on a website: information you couldn't find (e.g. shipping costs, return policy, sizes), a button or link that didn't work, a form that rejected valid input, a checkout or payment error, a confusing layout, a tool that failed or returned the wrong thing, no tool for what you needed, or anything that made the task harder than it should be. Report even if you eventually succeeded. Report each problem once, not again on every retry. If you found a way past it, say what worked, so other agents can try it. Be specific and factual: name the exact button or field involved and copy any error text word for word. Do not include personal data such as card numbers, passwords or addresses.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "agent": {
            "description": "Which agent you are: your product or framework and your model, e.g. \"Claude in Chrome, Claude Sonnet 5.5\" or \"browser-use, GPT-5\". Leave out if you don't know.",
            "maxLength": 200,
            "minLength": 1,
            "type": "string"
          },
          "browser": {
            "description": "Where the browser you are using runs: \"user\" = the person's own browser on their device; \"cloud\" = a hosted, remote or headless browser; \"unknown\" if you can't tell.",
            "enum": [
              "user",
              "cloud",
              "unknown"
            ],
            "type": "string"
          },
          "channel": {
            "description": "How you were using the site: \"browser\" = clicking through its pages; \"webmcp\" = a WebMCP tool on the page; \"mcp\" = the site's MCP server; \"api\" = its API.",
            "enum": [
              "browser",
              "webmcp",
              "mcp",
              "api"
            ],
            "type": "string"
          },
          "element": {
            "description": "The exact button, link or form field involved, named as it appears on the page, e.g. \"'Continue to payment' button\" or \"'ZIP code' field\". Leave out if the problem wasn't about one element (e.g. information you couldn't find).",
            "maxLength": 300,
            "minLength": 1,
            "type": "string"
          },
          "error_shown": {
            "description": "Any error or warning the page showed, copied word for word. Write \"none\" if the page showed no error.",
            "maxLength": 1000,
            "minLength": 1,
            "type": "string"
          },
          "goal": {
            "description": "What you were trying to accomplish, e.g. \"Find the shipping cost to Canada before buying\".",
            "maxLength": 500,
            "minLength": 1,
            "type": "string"
          },
          "page_url": {
            "description": "The full URL of the page where the problem happened, or of the MCP server or API endpoint if you were calling a tool.",
            "maxLength": 2048,
            "minLength": 1,
            "type": "string"
          },
          "severity": {
            "description": "low = minor annoyance; medium = slowed you down; high = needed a workaround or guess; blocking = you could not complete the task.",
            "enum": [
              "low",
              "medium",
              "high",
              "blocking"
            ],
            "type": "string"
          },
          "site": {
            "description": "The website's domain, e.g. \"acme.com\".",
            "maxLength": 253,
            "minLength": 1,
            "type": "string"
          },
          "tool": {
            "description": "The name of the tool or API operation involved, e.g. \"update_cart\" or \"POST /cart\". If no tool existed for what you needed, name the tool you looked for. Leave out when you were using the site's pages.",
            "maxLength": 200,
            "minLength": 1,
            "type": "string"
          },
          "what_i_tried": {
            "description": "The concrete steps you took, in order, e.g. \"Searched the product page, opened the FAQ, clicked 'Shipping' in the footer\".",
            "maxLength": 4000,
            "minLength": 1,
            "type": "string"
          },
          "what_went_wrong": {
            "description": "What actually happened and why it was a problem.",
            "maxLength": 4000,
            "minLength": 1,
            "type": "string"
          },
          "what_worked": {
            "description": "If you got past the problem, the step that worked, e.g. \"Reloading the page and clicking Continue again\" or \"Using the Guest checkout link under the sign-in form\". Leave out if nothing worked.",
            "maxLength": 1000,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "site",
          "page_url",
          "goal",
          "what_i_tried",
          "what_went_wrong",
          "severity"
        ],
        "type": "object"
      },
      "name": "report_friction"
    }
  ]
}

What the leaf hashes

{"body":"89564285a7bcaf17ffb30c911e1f2615a418389bfc214f23b08950832f42462c","id":290866,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793047609692721,"prev":null,"subject":"ed3d7062-493e-47a6-820d-1e76e590cc07","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0x78dbeaf3c2dc3f4c0227a64f7bc2327b9a8b5633e6e20d9ddc6f13aa0faa13fa
2. 0xc2fb185ad143c6475e15a9a835c805cf9992efdcd094c06cde66f4ebe40d6718
3. 0xe48be740a7920be53b9a53c5a15ba4c44e3b4bed157e5b28d64a37ed8dd8be5d
4. 0x6a0a9449685d19d4840809f953cf770cd37cd9afdc00be5f9ba0056e67f720ba
5. 0x2a4b471dd3665fa10a26ff8537b2fb6f967e55e9c83f423df99433d5ea9b9ec3
6. 0x86bf4c04335f9e6416514ea91dccac70119ba8138a4c066090ba929aaea83fea
7. 0xae699277873b77eed7c054c0b5933d87c61ed8fe9ee5290a0ffa28572947ad91
8. 0x0d4fd7e61e6c4dd856c7060c712ea0f085a91b86e1468c510d7de10b5818cefc
9. 0x01b2461ff3c2bdb7522d8bc69556afc98ffc6fbaf4e3a114d4015aead79fd6bd
10. 0x97e46b70e0c331348eabcb4ab670fdafec5ed7123ffa5a6a8f2771a3eb69c9e9
11. 0x15ee99441401ec9e8c72aaf51bd6c821ec4e6b18bc91225370e5c19c4c8e8448
12. 0xdcba35a3346e9c4b9ae1267cc5995998c2c33da9ef658e955eaae1589ebbdcad
13. 0x01c95624b1f2385ef774ee258a9ae58a4df07a1bdaa829de84e1d5201f3f39c2
14. 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae