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

With no annotations provided, the description carries the full burden and does a good job by detailing the exact signal chain created ('Gate → Revamp EQ → Compressor (→ Reverb)'), the return value ('Returns effect indices and parameter values set'), and the optional reverb behavior. It does not disclose edge cases like invalid unit_index or whether existing effects are preserved, but the level of disclosure is substantially above average.

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-structured and front-loaded with the core purpose. It uses clear sections for parameters, chain construction, and examples. Every sentence contributes value—no filler—and the code examples at the end effectively illustrate usage patterns.

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?

For a tool with an output schema and moderate complexity, the description is exceptionally complete: it covers the signal chain, all parameters, presets, return behavior, and provides three usage examples. The only minor gap is lack of error handling details, but that does not detract from overall completeness given the rich context.

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 schema has 0% description coverage, so the description fully compensates by documenting all three parameters: unit_index as 'Target audio unit', style with five named presets and musical character, and reverb_amount with range and suggested values. It adds semantic richness beyond bare type information, including genre examples for each style.

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 clearly states the tool's function with a specific verb and resource: 'Add a ready-made drum processing chain to an audio unit — Gate → EQ → Compressor (+ optional Reverb).' It also distinguishes itself from sibling tools by explicitly mentioning that one call replaces 3-4 individual add_effect + set_effect_parameter calls, making it unique among effect-related operations.

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 description provides clear when-to-use context: designed for drum tracks but works on any rhythmic content, and an explicit efficiency advantage over manual effect chaining. However, it does not mention exclusions or alternatives like add_vocal_chain or add_mastering_chain, so usage guidance is strong but not exhaustive.

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