music

Generate music using ElevenLabs Music API. Use when creating instrumental tracks, songs with lyrics, background music, jingles, or any AI-generated music composition. Supports prompt-based generation, composition plans for granular control, and detailed output with metadata.

2.13x

Quality

86%

Does it follow best practices?

Impact

94%

2.13x

Average score across 3 eval scenarios

Securityby

Passed

No findings from the security scan

Quality

Content

85%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The content is actionable and well-structured with executable examples in three languages and clean one-level-deep references to real bundle files. It could tighten a few explanatory sections and add explicit validation checkpoints for generated output.

Suggestions

Move the enumerated API constraints (file counts, size/duration limits) and HTTP error codes into references/api_reference.md to tighten SKILL.md.

Add a brief validation step after generation (e.g. confirm the output file is non-empty / playable) before declaring success in the workflows.

Trim the restated 'Setup' note in the blockquote since installation is already covered in references/installation.md.

Dimension	Reasoning	Score
Conciseness	The body is largely lean with executable code blocks and brief tables, but includes light over-explanation such as restating constraints and error codes that could be trimmed or moved to the API reference.	4 / 5
Actionability	Provides copy-paste-ready executable examples across Python, JavaScript, and cURL for the main flows, plus concrete parameter usage and error-code enumeration covering the common cases.	5 / 5
Workflow Clarity	Multi-step flows (compose, composition plan -> modify -> compose, video-to-music) are sequenced clearly with constraints and error handling, but lack explicit validation checkpoints or verify-before-proceed steps; the operations are non-destructive so the destructive cap does not apply.	4 / 5
Progressive Disclosure	SKILL.md is a concise overview with well-signaled one-level-deep references to real bundle files (references/installation.md and references/api_reference.md), keeping bulk detail out of the main file for easy navigation.	5 / 5
	Total	18 / 20 Passed

Description

87%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A well-crafted description that clearly states both what the skill does and when to use it, with concrete capability lists and natural trigger terms. It is concise, third-person, and clearly distinguishable from other skills.

Dimension	Reasoning	Score
Specificity	Lists several concrete capabilities (prompt-based generation, composition plans for granular control, detailed output with metadata) and named output types (instrumental tracks, songs with lyrics, background music, jingles), with only minor coverage gaps such as video-to-music.	4 / 5
Completeness	Explicitly answers 'what' ('Generate music using ElevenLabs Music API ... Supports prompt-based generation, composition plans ...') and 'when' ('Use when creating instrumental tracks, songs with lyrics, background music, jingles ...') with concrete trigger phrases.	5 / 5
Trigger Term Quality	Includes natural terms users would say ('instrumental tracks', 'songs with lyrics', 'background music', 'jingles', 'AI-generated music') with good coverage, though it misses some synonyms and file extensions like .mp3 or 'music composition'.	4 / 5
Distinctiveness Conflict Risk	It targets a clearly distinct niche (ElevenLabs Music API for AI-generated music) with specific triggers unlikely to overlap with other skills, yielding minimal conflict risk.	5 / 5
	Total	18 / 20 Passed

Validation

87%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 14 / 16 Passed

Validation for skill structure

Criteria	Description	Result
metadata_version	'metadata.version' is missing	Warning
metadata_field	'metadata' should map string keys to string values	Warning

	Total	14 / 16 Passed

Repository: neil-tessl/skill-index-evals-dev
Path: tiles/elevenlabs/skills/music/skill/SKILL.md
Commit: 2bad92e

Reviewed: 3 days ago

Table of Contents

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