Evidence row 222089

What was observed

{
  "count": 6,
  "tools": [
    {
      "description": "Use when a user asks what electrical work will cost — panel upgrade, wiring, outlet installation, or any electrical project. Returns cost range with permit guidance.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "job": {
            "description": "Type of electrical work",
            "enum": [
              "Panel upgrade",
              "Outlet/switch",
              "Wiring replacement",
              "EV charger",
              "Generator",
              "Ceiling fan",
              "Smoke detectors"
            ],
            "type": "string"
          },
          "permits": {
            "description": "Whether permits are likely required",
            "enum": [
              "Yes",
              "No",
              "Unknown"
            ],
            "type": "string"
          },
          "stories": {
            "description": "Number of stories in the home",
            "maximum": 4,
            "minimum": 1,
            "type": "number"
          }
        },
        "required": [
          "job"
        ],
        "type": "object"
      },
      "name": "electrical-cost-calculator"
    },
    {
      "description": "Use when a user asks what HVAC replacement, installation, or repair will cost. Given home size, system type, and efficiency tier, returns low/high cost range, regional context, and contractor comparison guidance.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "efficiency": {
            "description": "Efficiency tier (affects cost)",
            "enum": [
              "Basic",
              "Mid",
              "High"
            ],
            "type": "string"
          },
          "sqft": {
            "description": "Home size in square feet",
            "maximum": 8000,
            "minimum": 300,
            "type": "number"
          },
          "system": {
            "description": "HVAC system type",
            "enum": [
              "Heat Pump",
              "Central AC",
              "Furnace + AC",
              "Furnace only"
            ],
            "type": "string"
          },
          "work_type": {
            "description": "Type of work needed",
            "enum": [
              "Replace",
              "Repair",
              "New install"
            ],
            "type": "string"
          }
        },
        "required": [
          "sqft"
        ],
        "type": "object"
      },
      "name": "hvac-cost-calculator"
    },
    {
      "description": "Use when a user asks what plumbing repair, pipe replacement, or emergency plumbing will cost. Returns cost range and contractor guidance.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "access": {
            "description": "Access difficulty",
            "enum": [
              "Normal",
              "Difficult (wall/floor access)"
            ],
            "type": "string"
          },
          "job": {
            "description": "Type of plumbing work",
            "enum": [
              "Leak repair",
              "Pipe replacement",
              "Drain cleaning",
              "Water heater",
              "Fixture install",
              "Emergency"
            ],
            "type": "string"
          },
          "urgency": {
            "description": "Scheduling urgency",
            "enum": [
              "Standard",
              "Urgent (same day)",
              "Emergency (after hours)"
            ],
            "type": "string"
          }
        },
        "required": [
          "job"
        ],
        "type": "object"
      },
      "name": "plumbing-cost-calculator"
    },
    {
      "description": "Use when a user asks what a new roof, roof replacement, or roof repair will cost. Given roof area, pitch, and material, returns cost range and contractor guidance.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "area": {
            "description": "Roof area in square feet",
            "maximum": 8000,
            "minimum": 500,
            "type": "number"
          },
          "material": {
            "description": "Roofing material",
            "enum": [
              "Asphalt",
              "Metal",
              "Tile",
              "Slate"
            ],
            "type": "string"
          },
          "pitch": {
            "description": "Roof pitch/steepness",
            "enum": [
              "Low",
              "Moderate",
              "Steep"
            ],
            "type": "string"
          },
          "tearoff": {
            "description": "Whether old roof needs removing",
            "enum": [
              "Yes",
              "No"
            ],
            "type": "string"
          }
        },
        "required": [
          "area"
        ],
        "type": "object"
      },
      "name": "roofing-cost-calculator"
    },
    {
      "description": "Use when a user asks what solar panels cost, solar installation cost, or solar payback period. Returns system cost, payback timeline, and incentive guidance.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "battery": {
            "description": "Whether battery backup is wanted",
            "enum": [
              "Yes",
              "No",
              "Maybe"
            ],
            "type": "string"
          },
          "monthly_bill": {
            "description": "Current monthly electric bill in USD",
            "maximum": 1000,
            "minimum": 30,
            "type": "number"
          },
          "roof_type": {
            "description": "Roof type",
            "enum": [
              "Asphalt shingle",
              "Metal",
              "Tile",
              "Flat"
            ],
            "type": "string"
          },
          "shading": {
            "description": "Amount of roof shading",
            "enum": [
              "Low",
              "Moderate",
              "High"
            ],
            "type": "string"
          }
        },
        "required": [
          "monthly_bill"
        ],
        "type": "object"
      },
      "name": "solar-cost-calculator"
    },
    {
      "description": "Use when a user asks what a water heater replacement or installation costs. Returns cost range by type (tank/tankless), fuel, and size. Note: heat-pump water heaters have a distinct installed cost profile and are not modeled here.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "fuel": {
            "description": "Fuel source",
            "enum": [
              "Gas",
              "Electric",
              "Propane"
            ],
            "type": "string"
          },
          "size": {
            "description": "Tank size (for tank heaters)",
            "enum": [
              "Small (30–40 gal)",
              "Medium (50 gal)",
              "Large (75–80 gal)"
            ],
            "type": "string"
          },
          "type": {
            "description": "Water heater type (heat-pump water heaters not modeled — see decision-layer copy)",
            "enum": [
              "Tank",
              "Tankless"
            ],
            "type": "string"
          }
        },
        "required": [
          "type"
        ],
        "type": "object"
      },
      "name": "water-heater-cost-calculator"
    }
  ]
}

What the leaf hashes

{"body":"e9b6e76476946d46c85d37352b9fd225eb5b373d6d8b59135a8b385b33924662","id":222089,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793027810370311,"prev":null,"subject":"844ae42e-1b80-4300-bfcc-08310364f9fb","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. 0x906bd49056df754bb208e9f21ae983b870b010304cd8beb7ebc97cfff7107d30
2. 0x5115c0d1335d7bcdf6f3df9846b9dad467f642c107e9864f0f05bff8b741d488
3. 0x7dee8feb6989c59928f0a7a191cc5e1ca12d72d569772b76d6a3ea8a1805859a
4. 0xfff6df343c815305d74f511fb33af2f142bb10e176416194855b352812d7784e
5. 0x6d3e79f22b7bda36502a430cd5ae56370428b2b96bae1cfd0267e201c5cd9a81
6. 0xaa7af32db645befff8bdc6f2b085561a30c2577265232b19acb7f3174288002b
7. 0xeef91b85c038c66568f51d2d6a036beca2c6cf96fbd6b30e7e52c9de0c8e606c
8. 0x58de9b6833758e57469c9a5ff896a04ea3f44f5b285de4212ed47930bc56d276
9. 0x957ebc7023975d8dcec4401284c254f8b3fe230b729fef0aaf533a85e7cfd531
10. 0xaceb83c372739bd98e77173713a458afd2092803e86ac0b8b2afe3eb94ca90c0
11. 0xc41c5ee73cf254bf3fe8e9a8475b0931c3223f7331f30010bc3a5e2a753329d6
12. 0x4634efb8094d1dd2874013b832ad8653e49400f57bf98efdcc5f925ed08d0f5b
13. 0xc0cb184c9bdf71abcf18fda97bd59289153d120dbf8fee9f517b63bf303deb95
14. 0xf0edabbb9ba0d643e5505d19d07637eb6f6aed0a1c7356af43ae7d84ae9ef0c5
15. 0xf0bd63870f0bb378fa300bd33563050dcb7b3e02b44eb3ee550c1c534ec4b246
16. 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae