# canvas.read query read Use when current canvas state is missing from the task context. ## Before calling - Authenticate as the accountable Enhance person. - Use only resource identifiers returned by an earlier capability result or supplied by the person. ## Input

Show complete JSON Schema

```json {"$schema":"https://json-schema.org/draft/2020-12/schema","anyOf":[{"oneOf":[{"type":"object","properties":{"view":{"type":"string","const":"resources"},"limit":{"default":30,"type":"integer","minimum":1,"maximum":100},"cursor":{"type":"string","minLength":1,"maxLength":16384},"canvasRef":{"type":"string","minLength":1,"description":"Canvas UUID or full canvas/selection URL. Preserve the supplied scope."},"expectedVersion":{"type":"integer","exclusiveMinimum":0,"maximum":9007199254740991}},"required":["view","canvasRef"],"additionalProperties":false},{"type":"object","properties":{"canvasRef":{"type":"string","minLength":1,"description":"Canvas UUID or full canvas/selection URL. Preserve the supplied scope."},"expectedVersion":{"type":"integer","exclusiveMinimum":0,"maximum":9007199254740991},"view":{"type":"string","const":"editable"},"rootNodeId":{"type":"string","minLength":1}},"required":["canvasRef","view","rootNodeId"],"additionalProperties":false},{"type":"object","properties":{"canvasRef":{"type":"string","minLength":1,"description":"Canvas UUID or full canvas/selection URL. Preserve the supplied scope."},"expectedVersion":{"type":"integer","exclusiveMinimum":0,"maximum":9007199254740991},"view":{"type":"string","const":"source"},"nodeId":{"type":"string","minLength":1},"transcript":{"type":"object","properties":{"startMs":{"default":0,"type":"integer","minimum":0,"maximum":9007199254740991},"endMs":{"type":"integer","minimum":0,"maximum":9007199254740991},"limit":{"default":30,"type":"integer","minimum":1,"maximum":100},"cursor":{"type":"string","minLength":1,"maxLength":16384}},"additionalProperties":false}},"required":["canvasRef","view","nodeId"],"additionalProperties":false},{"type":"object","properties":{"canvasRef":{"type":"string","minLength":1,"description":"Canvas UUID or full canvas/selection URL. Preserve the supplied scope."},"expectedVersion":{"type":"integer","exclusiveMinimum":0,"maximum":9007199254740991},"view":{"type":"string","const":"outline"},"rootNodeIds":{"minItems":1,"maxItems":1000,"type":"array","items":{"type":"string","minLength":1}},"depth":{"default":2,"type":"integer","minimum":0,"maximum":64},"limit":{"default":50,"type":"integer","minimum":1,"maximum":100},"cursor":{"type":"string","minLength":1,"maxLength":16384}},"required":["canvasRef","view"],"additionalProperties":false}],"type":"object"},{"type":"object","properties":{"canvas":{"type":"string","minLength":1,"description":"Complete canvas, page or selection URL, or canvas UUID. Preserve the supplied scope."},"nodeId":{"description":"Optional subtree within the supplied page or selection.","type":"string","minLength":1}},"required":["canvas"],"additionalProperties":false}],"type":"object"} ```

### Example

Show example input

```json { "canvasRef": "00000000-0000-4000-8000-000000000010", "view": "outline", "depth": 2, "limit": 50 } ```

## Result Returns a typed canvas.read result from the Enhance API without transport-specific prose. ## Recovery - BAD_REQUEST: correct the named fields and call again. - UNAUTHORIZED: restore Enhance authentication, then retry once. - FORBIDDEN or NOT_FOUND: check the supplied resource and selection; do not substitute unrelated content. Ask for corrected access or scope if needed. - CONFLICT: read the current resource, merge the intended change, and retry with its version. - INTERNAL: run Enhance diagnostics, report the failure, and stop repeating the call. ## Continue with - Use the returned identifiers and version in the next canvas operation. Compatibility: `bdc5c7a6620ff0091dd0a4449a22e51b3abd8f1cc3b35ad7fec2703300ee2805`.