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

With no annotations provided, the description discloses the exact effect chain created ('Revamp EQ → Compressor → Reverb (→ Delay)') and the return value ('Returns effect indices and parameter values set'). However, it doesn't state whether the chain is appended to existing effects or replaces them, nor does it mention error conditions (e.g., non-instrument units). This is a minor transparency gap.

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 front-loaded with a clear purpose, then uses bullet-style parameter explanations and illustrative examples. Though relatively long, every sentence adds functional value—no fluff or repetition. The structure makes the information easy to scan.

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 tool has moderate complexity (4 parameters, 5 style presets). The description covers purpose, parameter semantics, style selection, defaults, the exact effect chain, and return values. With an output schema present, this is sufficient for an agent to invoke the tool correctly across diverse use cases.

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?

Schema descriptions are entirely absent (0% coverage), so the description carries full responsibility for parameter meaning. It thoroughly explains unit_index, style (with five detailed preset definitions), reverb_amount (0-1, default), and delay_amount (0-1, default). The examples further illustrate parameter combinations, adding value beyond the empty schema.

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 first sentence clearly states the action ('Add a ready-made instrument processing chain') and the exact resource ('EQ → Compressor → Reverb (+ optional Delay)'). It also specifies the target usage ('guitars, keys, synth leads, strings, pads'), distinguishing it from related chain tools like add_drum_chain or add_bass_chain.

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 explicitly frames when to use this tool: 'One call replaces 3-4 individual add_effect + set_effect_parameter calls.' It also gives concrete style recommendations for different instruments, making the use case clear. Although it doesn't name sibling alternatives directly, it defines its scope as 'any melodic/harmonic instrument,' which implies exclusions.

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