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mcp_opendaw_set_vocoder_modulator_source

Sets the modulator source for a Vocoder effect in openDAW. Choose from white, pink, or brown noise, self-modulation, or external input.

Instructions

Set the modulator source on a Vocoder effect.

unit_index: AU index. effect_index: Effect index in the audio effect chain (must be a Vocoder). source: One of "noise-white", "noise-pink", "noise-brown", "self", "external".

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sourceYes
unit_indexYes
effect_indexYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations are provided, so the description carries full burden. It indicates a mutation operation ('Set') but does not disclose side effects, permissions, or constraints beyond the effect type. The behavioral impact of changing the source is not described.

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

Conciseness4/5

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

The description is brief and front-loaded with the main action. However, it repeats parameter names as mere labels, which could be trimmed. Overall, it is efficient and reasonably structured.

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

Completeness3/5

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

An output schema exists (not shown), so return values need not be explained. However, for a mutation tool, the description lacks context about expected outcome (e.g., immediate change) and fallback behavior. It is minimally complete.

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

Parameters4/5

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

Schema description coverage is 0%, but the description adds meaning by explaining each parameter: unit_index as 'AU index', effect_index as effect index in chain (must be Vocoder), source with five explicit enum values. This goes beyond the bare schema.

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 'Set the modulator source on a Vocoder effect', using a specific verb and resource. It distinguishes itself from sibling 'set_' tools by targeting a specific effect type and parameter.

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

Usage Guidelines2/5

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

No guidance on when to use this tool versus alternatives. It does not provide prerequisites (e.g., existence of a Vocoder effect) or when not to use it. The description only lists parameters without usage context.

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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