Tool tree

umbra-webmcp.vercel.app

Media & PersonalTools verifiedOct 26, 2026

UMBRA DRIFT is a living WebMCP recovery trial where a human changes the light and an agent must safely recover.

umbra_read_trialAnswer

Read the current UMBRA DRIFT trial, including human-controlled light state, rig transforms, revisions, temporary capabilities and alignment. This does not change the page.

View tool JSON

{
  "name": "umbra_read_trial",
  "kind": "answer",
  "impl": "imperative",
  "description": "Read the current UMBRA DRIFT trial, including human-controlled light state, rig transforms, revisions, temporary capabilities and alignment. This does not change the page.",
  "inputSchema": {
    "type": "object",
    "properties": {},
    "additionalProperties": false
  }
}

umbra_measure_projectionAction

Measure signed projection residuals for one to four shadow cutouts under the current human-controlled light. It changes no lamp, rig, or grant; the visible audit ledger records the measurement.

View tool JSON

{
  "name": "umbra_measure_projection",
  "kind": "act",
  "impl": "imperative",
  "description": "Measure signed projection residuals for one to four shadow cutouts under the current human-controlled light. It changes no lamp, rig, or grant; the visible audit ledger records the measurement.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "cutouts": {
        "type": "array",
        "items": {
          "type": "string",
          "enum": [
            "moon",
            "key",
            "fan",
            "thorn"
          ]
        },
        "minItems": 1,
        "maxItems": 4,
        "uniqueItems": true,
        "description": "Optional unique cutouts to measure. Omit to measure all four."
      }
    },
    "additionalProperties": false
  }
}

umbra_request_capabilityAction

Ask the human to grant the temporary COMPOSE or one-shot AWAKEN capability. This only creates a visible request; it cannot grant permission itself.

View tool JSON

{
  "name": "umbra_request_capability",
  "kind": "act",
  "impl": "imperative",
  "description": "Ask the human to grant the temporary COMPOSE or one-shot AWAKEN capability. This only creates a visible request; it cannot grant permission itself.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "capability": {
        "type": "string",
        "enum": [
          "COMPOSE",
          "AWAKEN"
        ],
        "description": "The human-owned capability being requested."
      },
      "reason": {
        "type": "string",
        "minLength": 4,
        "maxLength": 180,
        "pattern": "\\S",
        "description": "A concise reason shown to the human."
      }
    },
    "required": [
      "capability",
      "reason"
    ],
    "additionalProperties": false
  }
}