// Returns the notes and intervals of a named chord (e.g. Cmaj7 = C E G B). Calls the deterministic `ga_chord_info` MCP tool — never recall an answer from training data, since LLMs commonly flip enharmonics (Db vs C#) based on which source they saw.
[HINT] Download the complete skill directory including SKILL.md and all related files
| name | chord-info |
| description | Returns the notes and intervals of a named chord (e.g. Cmaj7 = C E G B). Calls the deterministic `ga_chord_info` MCP tool — never recall an answer from training data, since LLMs commonly flip enharmonics (Db vs C#) based on which source they saw. |
| triggers | ["what is a chord","what is the chord","what chord is","what notes are in","notes in a","notes of a","spell a chord","spell the chord","chord notes","chord intervals","spell a c","spell a d","spell a e","spell a f","spell a g","spell an a","spell a b"] |
| license | internal |
| compatibility | {"agent-framework":">=1.0.0-preview","microsoft-extensions-ai":">=10.5.1"} |
| metadata | {"authoring-style":"tool-driven","origin":"third MCP-tool-driven canary; replaces direct C# ChordInfoSkill in the SKILL.md path","evidence-kinds":["tool_call"]} |
| allowed-tools | ["ga_chord_info"] |
When a user asks for the notes / intervals / construction of a named chord, call the ga_chord_info MCP tool. Do NOT recall the notes from training knowledge — different sources spell the same chord differently (Bbm = Bb-Db-F vs Bb-C#-F) and the LLM will confidently produce wrong enharmonics for less-common keys.
The tool takes one argument:
chordSymbol — string, e.g. "C", "Cm", "Cmaj7", "F#dim", "Bbm7". Case-insensitive root letter; quality suffix uses the standard short forms below.It returns a structured result:
Symbol — chord symbol echoed back.Root — root note in canonical case (e.g. "F#").Quality — long form: "major", "minor", "diminished", "augmented", "dominant 7", "major 7", "minor 7".Notes — array of chord tones in ascending order.Intervals — interval names for each note (e.g. ["root", "major third", "perfect fifth"]).Error — non-null only when the input could not be parsed.| Symbol form | Quality returned |
|---|---|
C, Cmaj, CM | "major" |
Cm, Cmin | "minor" |
Cdim | "diminished" |
Caug | "augmented" |
C7, Cdom7 | "dominant 7" |
Cmaj7, CM7 | "major 7" |
Cm7, Cmin7 | "minor 7" |
chordSymbol="C" (or "Cmaj").chordSymbol="Dm7".chordSymbol="B7".chordSymbol="Fm".chordSymbol="Cmaj7".Use the Notes array verbatim, joined with – (en-dash) or commas. Mention the Quality and the Intervals for educational color. Example:
A Cmaj7 chord contains C – E – G – B (root, major third, perfect fifth, major seventh).
If Error is non-null, surface the message verbatim and ask the user to clarify.
ga_chord_info.ga_chord_identify(notes) tool.Common/GA.Business.ML/Agents/Mcp/ChordMcpTools.csTests/Common/GA.Business.ML.Tests/Unit/ChordMcpToolsTests.csCommon/GA.Business.ML/Agents/Skills/ChordInfoSkill.cs (regex-driven, no LLM round-trip — kept for the deterministic fast path)