Live Parity

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

With no annotations, the description does substantial work: it discloses the isolated silent engine, the edge-effect caveat about judging from the second bar, the 3 ms ok / 100 ms search lag tolerance, residual thresholds (-100 dB identical, -80 dB inaudible), and the ~2x render runtime cost. It stops short of stating whether the tool alters project or deck state, which is the main behavioral 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 purpose is front-loaded and most clauses carry real information (thresholds, edge caveat, runtime), but the body is a dense run-on packed with nested parentheticals that is hard to parse. A shorter, sentence-per-idea structure would preserve the content and improve scanability.

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?

An output schema exists, so return values needn't be explained, and the description covers the comparison mechanics, tolerances, caveats, and cost well enough to invoke correctly. The missing piece is an explicit statement of side effects/safety, which matters more given the absence of annotations.

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 coverage is 0%, so the description must compensate and largely does: 'bars=[a, b]' shows the expected shape, and 'tracks limits both sides to those tracks' clarifies that the filter applies to the studio and live renders alike, which the bare array schema would not convey. The required song parameter is never described, though it is largely self-evident.

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 opening question ('Does this song play on a deck as it renders in the studio?') states a specific comparison between studio render and live deck playback, and the metric list (level, envelope, octave bands, residual) makes the tool's scope concrete. It never names a sibling (e.g. compare, sound_compare, cmp_bars) to route against, so an agent must infer the boundary from content alone.

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 framing implies a clear use case (verifying live/studio fidelity) and the note 'no live_start needed, nothing is late' tells the agent this runs standalone without the live_start flow. There are no explicit when-not conditions or named alternatives, so routing is left implicit.

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