Get Diatonic Chords

Tool name: get-diatonic-chords

Returns the seven diatonic triads of a key with degree, Roman numeral, chord symbol, and quality bucket.

Annotations

Hint	Value
readOnlyHint	✓
idempotentHint	✓
destructiveHint	—
openWorldHint	—

Input

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "key": {
      "type": "string",
      "minLength": 1,
      "description": "Key as \"<tonic> <mode>\" — e.g. \"C major\", \"A minor\", \"F# minor\"."
    }
  },
  "required": [
    "key"
  ],
  "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": "object",
        "properties": {
          "degree": {
            "type": "integer",
            "minimum": -9007199254740991,
            "maximum": 9007199254740991,
            "description": "Scale degree, 1..7."
          },
          "roman": {
            "type": "string",
            "description": "Roman numeral (uppercase=major, lowercase=minor, °=dim)."
          },
          "symbol": {
            "type": "string",
            "description": "Diatonic chord symbol."
          },
          "quality": {
            "type": "string",
            "description": "Quality bucket: maj, min, dim, aug, dom7, maj7, min7, m7b5, or other."
          }
        },
        "required": [
          "degree",
          "roman",
          "symbol",
          "quality"
        ],
        "additionalProperties": false
      },
      "description": "Diatonic triads of the key, indexed by degree."
    }
  },
  "required": [
    "chords"
  ],
  "additionalProperties": false
}