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set_eq_band

Adjust ReaEQ band frequency, gain, or Q by specifying band type, band index, and parameter value. Accepts real units or normalized 0-1 values for direct control.

Instructions

Set a ReaEQ band parameter.

Pass real values by default: frequency in Hz (paramtype 0), gain in dB (paramtype 1), or Q (paramtype 2). Gain is converted to ReaEQ's normalized curve internally; freq and Q are sent raw.

Args: fx_index: FX index (0-based) of ReaEQ. bandtype: -1=master gain, 0=hipass, 1=loshelf, 2=band, 3=notch, 4=hishelf, 5=lopass, 6=bandpass, 7=parallel bandpass. bandidx: Band index within that type (0=first). Ignored for master gain. paramtype: 0=frequency (Hz), 1=gain (dB), 2=Q. Ignored for master gain. value: The value, in real units unless is_normalized=True. is_normalized: If True, value is a raw 0-1 normalized value written directly.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
valueYes
bandidxYes
bandtypeYes
fx_indexYes
paramtypeYes
track_indexYes
is_normalizedNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.7.3

TDQS

A4/5.0
Behavior4/5

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

Beyond the minimal annotation (destructiveHint: false), the description discloses important behavioral details: gain is converted internally to normalized curve while freq and Q are sent raw, and is_normalized allows raw values. This adds value. However, it does not mention side effects, error conditions, or return values, which would be useful for a mutation tool.

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

Conciseness5/5

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

The description is well-structured: a clear one-sentence purpose, then a compact arg list. It is concise without being sparse, and the front-loaded purpose makes it easy to parse. Every line adds useful information.

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

Completeness2/5

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

For a tool with 7 parameters and minimal annotations, the description is incomplete. It fails to document track_index, provides no return value or error information, and does not mention any side effects. While it explains the parameter logic well, the missing required parameter and lack of outcome details leave the agent underinformed.

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

Parameters3/5

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

The description explains six of seven parameters in detail, including enums for bandtype and paramtype and units for value. However, it completely omits track_index, which is a required parameter. With 0% schema coverage, the description must compensate, and missing a required parameter is a significant gap.

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

Purpose5/5

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

The description clearly states the action (set a ReaEQ band parameter) and enumerates the parameter types and band types, making it distinct from sibling tools like set_eq_band_enabled. The verb+resource is specific and unambiguous, even though track_index is not mentioned, the core purpose is clear.

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

Usage Guidelines4/5

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

The description provides clear context for when to use this tool (to adjust frequency, gain, or Q on a ReaEQ band) and implicitly indicates it is not for enabling/disabling bands (a separate sibling). However, it does not explicitly mention alternatives or when not to use it, so it lacks explicit exclusion guidance.

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

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