Transpose Progression

Tool name: transpose-progression

Transposes a chord progression by an interval or to a target tonic (relative to the first chord).

Annotations

Hint	Value
readOnlyHint	✓
idempotentHint	✓
destructiveHint	—
openWorldHint	—

Input

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "chords": {
      "minItems": 1,
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1
      }
    },
    "interval": {
      "type": "string",
      "minLength": 1
    },
    "targetKey": {
      "type": "string",
      "minLength": 1
    }
  },
  "required": [
    "chords"
  ],
  "additionalProperties": false
}

Output

Returned as structuredContent. The text rendering is a short human-readable summary.

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "chords": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Transposed chord progression."
    },
    "interval": {
      "type": "string",
      "description": "The interval applied (resolved from `targetKey` if used)."
    }
  },
  "required": [
    "chords",
    "interval"
  ],
  "additionalProperties": false
}