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nickbeentjes

mac-audio-router-mcp

by nickbeentjes

mute

Silence or restore system audio output on macOS. Quickly toggle audio off or on without changing volume levels.

Instructions

Mute or unmute the system audio output

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
mutedYestrue to mute, false to unmute

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

B3.3/5.0
Behavior3/5

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

No annotations are provided, so the description carries the full behavioral burden. It does convey the useful trait that the operation is a reversible toggle ('mute or unmute'), but says nothing about permissions, whether state persists, or what is returned.

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?

A single front-loaded sentence with zero filler; the operation is stated before any qualification and nothing is wasted.

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?

For a one-parameter toggle with no output schema, the description covers the core action adequately. It is thin on usage context and return behavior, but the simplicity of the tool keeps it from being seriously inadequate.

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?

Schema coverage is 100% and the boolean 'muted' parameter is fully documented in the schema itself ('true to mute, false to unmute'). The description adds no syntax or semantics beyond that, so the baseline of 3 applies.

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

Purpose4/5

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

The description states a specific verb pair (mute/unmute) and a clear resource (system audio output), so the agent immediately knows the operation. It does not, however, distinguish this from siblings like set_volume or set_device_volume, which could also silence output.

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?

There is no when-to-use guidance, no prerequisites, and no mention of alternatives such as set_volume(0) or set_device_volume. The agent must infer the use case purely from the verb.

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