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

With no annotations provided, the description carries full burden. It discloses the effects created (Gate → EQ → Compressor → optional Reverb) and mentions returning effect indices and values. However, it does not clarify whether existing effects are preserved or overwritten, nor does it mention any side effects.

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: a one-line summary, a benefit statement, a parameter list with clear headings and descriptions, and a multi-line example section. Every sentence adds value, and the formatting aids readability.

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?

Given three parameters, no required ones, absence of schema descriptions, and presence of an output schema, the description fully covers purpose, usage context, parameter meanings, expected output (effect indices and values), and includes practical examples. It is complete and self-contained.

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?

Despite 0% schema coverage, the description provides detailed semantics for all three parameters: unit_index (target as 'the drum track'), style (five named options with descriptions), and reverb_amount (range and typical usage). This adds significant value beyond the minimal 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 description clearly states the action ('Add a ready-made drum processing chain') and the resource ('audio unit'), with a specific sequence of effects. It distinguishes from sibling tools like add_bass_chain and add_vocal_chain by explicitly targeting drums and rhythmic content.

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 explains the tool is designed for drum tracks but works on any rhythmic content, and notes it replaces multiple individual effect calls. It provides clear context for use, though it does not explicitly state when not to use it (e.g., for non-rhythmic content).

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