Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden. It discloses the transformation behavior, per-section velocity multipliers, which musical elements are included/excluded in each section, and the return summary. However, it does not mention potential side effects on existing tracks (e.g., overwriting notes) or whether it is destructive.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is well-organized with clear sections: purpose, energy progression, parameter details, and examples. It is somewhat long and repeats section_lengths details, but every section adds meaningful info for a complex tool.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The musical behavior is thoroughly explained, and return values are stated. However, with 9 parameters, 5 are undocumented in the description, and there is no mention of how the tool interacts with the existing project (e.g., whether it creates new tracks or reuses existing ones). This leaves gaps for an agent attempting to invoke it correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description adds valuable semantics for genre, bpm, root, and section_lengths, including examples and constraints. But it completely omits explanations for the 5 remaining parameters (bass_track, drum_track, unit_index, melody_track, harmony_track), which are critical for routing the sections to the correct tracks. Since schema coverage is 0%, this is a notable gap.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description opens with a specific verb+resource: 'Create a multi-section electronic track from loop-based arrangements' and details the exact section flow (intro → buildup → drop → breakdown → outro). This clearly distinguishes it from generic arrangement tools and sibling genre-specific tools.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The intended use is clear: it is for electronic genres only (dnb, house, techno, etc.) and transforms loop-based arrangements into song structure. It explains the energy progression and likely use cases, but does not explicitly name alternatives (e.g., create_dnb_arrangement) or state when not to use it.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.