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MCP Audio Tweaker

by DeveloperZo

MCP Audio Tweaker

A Model Context Protocol (MCP) server for batch audio processing and optimization using FFmpeg. This package provides parameter-based audio modifications including sample rate conversion, bitrate adjustment, volume control, channel configuration, and audio effects.

Features

  • 🎵 Comprehensive Audio Processing: Sample rate conversion, bitrate adjustment, volume control, channel configuration

  • 🔧 FFmpeg Integration: Leverages FFmpeg for robust, cross-platform audio processing

  • 📦 Batch Processing: Process multiple audio files concurrently with queue management

  • 🎯 Preset System: Predefined configurations for common use cases (game audio, voice processing, music mastering)

  • 🎮 Game Audio Optimized: Special presets for mobile, desktop, and console game development

  • 🤖 ElevenLabs Integration: Optimized preset for ElevenLabs AI voice output

  • 🔍 MCP Compatible: Full integration with Claude Desktop and other MCP clients

  • Concurrent Processing: Efficient queue-based processing for large batch operations

  • 📊 Detailed Reporting: Comprehensive processing results and error handling

Related MCP server: FFmpeg MCP Tool

Installation

npm install -g mcp-audio-tweaker

Prerequisites

  • Node.js 18.0.0 or higher

  • FFmpeg installed and available in system PATH

Installing FFmpeg

Windows:

# Using Chocolatey
choco install ffmpeg

# Using winget
winget install FFmpeg

macOS:

# Using Homebrew
brew install ffmpeg

Linux:

# Ubuntu/Debian
sudo apt update && sudo apt install ffmpeg

# CentOS/RHEL
sudo yum install ffmpeg

Quick Start

MCP Integration with Claude Desktop

Add to your Claude Desktop configuration:

{
  "mcpServers": {
    "audio-tweaker": {
      "command": "npx",
      "args": ["-y", "mcp-audio-tweaker"],
      "env": {
        "AUDIO_TWEAKER_LOG_LEVEL": "info"
      }
    }
  }
}

Standalone Usage

Check system requirements:

mcp-audio-tweaker --standalone check

Process a single file:

mcp-audio-tweaker --standalone process \
  --input input.wav \
  --output output.mp3 \
  --volume -3 \
  --sample-rate 44100 \
  --bitrate 192 \
  --normalize

Batch process with preset:

mcp-audio-tweaker --standalone batch \
  --input-dir ./audio/raw \
  --output-dir ./audio/processed \
  --preset game-audio-mobile

List available presets:

mcp-audio-tweaker --standalone presets

MCP Tools

process_audio_file

Process a single audio file with custom operations.

Parameters:

  • inputFile (string): Path to input audio file

  • outputFile (string): Path for output file

  • operations (object): Audio processing operations

  • overwrite (boolean): Whether to overwrite existing files

Example:

{
  "inputFile": "/path/to/input.wav",
  "outputFile": "/path/to/output.mp3",
  "operations": {
    "volume": {
      "adjust": -3,
      "normalize": true,
      "targetLUFS": -20
    },
    "format": {
      "sampleRate": 44100,
      "bitrate": 192,
      "channels": 2,
      "codec": "mp3"
    },
    "effects": {
      "fadeIn": 0.1,
      "fadeOut": 0.2
    }
  }
}

batch_process_audio

Process multiple audio files in a directory.

Parameters:

  • inputDirectory (string): Directory containing input files

  • outputDirectory (string): Directory for processed files

  • filePattern (string): Glob pattern for file matching

  • operations (object): Audio processing operations

  • overwrite (boolean): Whether to overwrite existing files

apply_preset

Apply predefined audio processing preset.

Parameters:

  • inputFile (string): Path to input audio file

  • outputFile (string): Path for output file

  • preset (string): Preset name to apply

  • overwrite (boolean): Whether to overwrite existing files

Available Presets:

  • game-audio-mobile: Optimized for mobile games

  • game-audio-desktop: High-quality for desktop games

  • game-audio-console: Premium quality for consoles

  • elevenLabs-optimize: Optimizes ElevenLabs AI voice output

  • voice-processing: General voice and dialogue processing

  • music-mastering: High-quality music mastering

  • sfx-optimization: Sound effects and ambient audio

list_presets

List all available presets with descriptions.

Parameters:

  • category (string, optional): Filter by category (game, voice, music, effects)

get_queue_status

Get current status of the audio processing queue.

Audio Operations

Volume Operations

{
  "volume": {
    "adjust": -3,          // Volume adjustment in dB (-60 to +20)
    "normalize": true,     // Apply loudness normalization
    "targetLUFS": -23      // Target LUFS for normalization
  }
}

Format Operations

{
  "format": {
    "sampleRate": 44100,   // Sample rate (8000, 16000, 22050, 44100, 48000, 96000, 192000)
    "bitrate": 192,        // Bitrate in kbps (64-320)
    "channels": 2,         // Channel count (1, 2, 6, 8)
    "codec": "mp3"         // Codec (pcm, mp3, aac, vorbis, flac)
  }
}

Effects Operations

{
  "effects": {
    "fadeIn": 0.1,         // Fade in duration in seconds
    "fadeOut": 0.2,        // Fade out duration in seconds
    "trim": {              // Trim audio
      "start": 1.0,        // Start time in seconds
      "end": 30.0          // End time in seconds
    },
    "loop": {              // Loop audio
      "enabled": true,
      "count": 3           // Number of loops
    }
  }
}

Claude Desktop Usage Examples

Optimize ElevenLabs Voice Output

@audio-tweaker Apply the elevenLabs-optimize preset to the file /audio/voice-output.wav and save it as /audio/optimized-voice.mp3

Batch Process Game Audio

@audio-tweaker Process all WAV files in /game-assets/audio/raw/ using the game-audio-mobile preset and save them to /game-assets/audio/mobile/

Custom Voice Processing

@audio-tweaker Process /recordings/dialogue.wav with the following operations: normalize audio to -20 LUFS, convert to 22kHz mono MP3 at 128kbps, add 0.05s fade in and 0.1s fade out, and save as /processed/dialogue.mp3

Check Audio Processing Status

@audio-tweaker What's the current status of the audio processing queue?

Workflow Integration

Game Development Workflow

  1. Generate AI Voice with ElevenLabs

  2. Optimize with MCP Audio Tweaker: Apply elevenLabs-optimize preset

  3. Platform-specific Processing: Use game-audio-mobile, game-audio-desktop, or game-audio-console presets

  4. Integration: Import optimized audio into game engine

Music Production Workflow

  1. Record/Import Audio

  2. Master with Audio Tweaker: Apply music-mastering preset

  3. Platform Optimization: Create platform-specific versions

  4. Distribution: Export in required formats

Configuration

Environment Variables

  • AUDIO_TWEAKER_LOG_LEVEL: Set logging level (debug, info, warn, error)

  • FFMPEG_PATH: Custom FFmpeg binary path (optional)

Advanced Configuration

The package supports advanced FFmpeg configurations through direct parameter passing. See the FFmpeg documentation for additional options.

Error Handling

The package provides comprehensive error handling with specific error codes:

  • FILE_NOT_FOUND: Input file does not exist

  • FFMPEG_NOT_FOUND: FFmpeg not installed or not in PATH

  • INVALID_PARAMETERS: Processing parameters validation failed

  • OUTPUT_WRITE_FAILED: Cannot write to output location

  • PROCESSING_FAILED: FFmpeg processing failed

  • PRESET_NOT_FOUND: Requested preset does not exist

Performance

  • Concurrent Processing: Default 2 concurrent operations (configurable)

  • Queue Management: Efficient processing queue with pause/resume capabilities

  • Memory Efficient: Streams audio data without loading entire files into memory

  • Cross-platform: Optimized for Windows, macOS, and Linux

Supported Formats

Input Formats: MP3, WAV, OGG, FLAC, M4A, AAC Output Formats: MP3, WAV, OGG, FLAC, M4A, AAC

Development

Building from Source

git clone https://github.com/your-org/mcp-audio-tweaker.git
cd mcp-audio-tweaker
npm install
npm run build

Running Tests

npm test
npm run test:coverage
npm run test:ffmpeg

Contributing

  1. Fork the repository

  2. Create a feature branch

  3. Make your changes

  4. Add tests for new functionality

  5. Submit a pull request

Complete Documentation

This README provides a quick overview. For comprehensive documentation:

🚀 Getting Started

🔧 Support & Troubleshooting

License

MIT License - see LICENSE file for details.

Support

Acknowledgments

Available Tools

9 tools
advanced_processC

Apply advanced audio processing including pitch shifting, spectral processing, dynamics, and spatial effects

ParametersJSON Schema
NameRequiredDescriptionDefault
inputFileYesPath to input audio file
outputFileYesPath for output file
pitchNoPitch shifting operations
tempoNoTempo adjustment operations
spectralNoSpectral processing operations
dynamicsNoDynamics processing operations
spatialNoSpatial processing operations
overwriteNoWhether to overwrite existing output files

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries full burden for behavioral disclosure. While 'Apply advanced audio processing' implies a transformative operation, it doesn't disclose critical behaviors: whether processing is destructive to the original file, computational requirements, supported audio formats, error handling, or typical processing time. The description mentions effect categories but not how they're applied or sequenced.

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 a single, efficient sentence that front-loads the core purpose. Every word contributes meaning by listing the four processing categories. However, it could be slightly more structured by separating the tool's primary function from its capabilities.

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 complex audio processing tool with 8 parameters (including nested objects), no annotations, and no output schema, the description is inadequate. It doesn't explain what the tool returns (success/failure, processing metadata, error messages), doesn't address performance characteristics, and provides minimal guidance for a tool with substantial parameter complexity and multiple sibling alternatives.

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?

With 100% schema description coverage, the schema already documents all 8 parameters thoroughly. The description adds minimal value beyond the schema by naming the processing categories (pitch, spectral, dynamics, spatial) that correspond to optional parameter objects, but doesn't provide additional context about parameter interactions, default behaviors when optional params are omitted, or processing order.

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 clearly states the tool's purpose with specific verbs ('Apply advanced audio processing') and resources ('audio'), listing key processing categories (pitch shifting, spectral processing, dynamics, spatial effects). However, it doesn't explicitly differentiate this from sibling tools like 'process_audio_file' or 'apply_preset', which likely handle similar audio processing tasks.

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?

The description provides no guidance on when to use this tool versus alternatives. With siblings like 'process_audio_file', 'apply_preset', and 'batch_process_audio', there's no indication whether this is for complex multi-effect processing, real-time vs batch operations, or when simpler tools might suffice.

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

apply_presetC

Apply predefined audio processing preset optimized for specific use cases

ParametersJSON Schema
NameRequiredDescriptionDefault
inputFileYesPath to input audio file
outputFileYesPath for output file
presetYesPreset name to apply
overwriteNoWhether to overwrite existing output files

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries full burden but lacks critical behavioral details. It doesn't disclose whether this is a read-only or destructive operation, what happens if the output file exists (beyond the 'overwrite' parameter), performance characteristics, or error conditions. The description adds minimal context beyond the basic action.

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 a single, efficient sentence that states the core purpose without unnecessary words. It's appropriately sized for the tool's complexity and gets straight to the point with zero waste.

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 4 parameters, no annotations, and no output schema, the description is inadequate. It doesn't explain what the tool returns, what happens during processing, error handling, or performance expectations. The mention of 'optimized for specific use cases' is too vague to be helpful without elaboration.

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?

With 100% schema description coverage, the schema already documents all 4 parameters thoroughly. The description adds no additional parameter semantics beyond what's in the schema - it doesn't explain what the presets do, provide examples, or clarify relationships between parameters. Baseline 3 is appropriate when schema does the heavy lifting.

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 clearly states the verb 'apply' and the resource 'predefined audio processing preset', specifying it's optimized for specific use cases. It distinguishes from siblings like 'process_audio_file' by focusing on preset application rather than general processing, though it doesn't explicitly name alternatives.

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 is provided on when to use this tool versus alternatives like 'process_audio_file' or 'advanced_process'. The description mentions 'optimized for specific use cases' but doesn't specify what those cases are or when to choose this over other tools.

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

batch_process_audioC

Apply audio processing operations to multiple files in a directory

ParametersJSON Schema
NameRequiredDescriptionDefault
inputDirectoryYesDirectory containing input files
outputDirectoryYesDirectory for processed files
filePatternNoGlob pattern for file matching*.{mp3,wav,ogg,flac,m4a,aac}
operationsYesAudio processing operations to apply (same as process_audio_file)
overwriteNoWhether to overwrite existing output files

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states 'apply audio processing operations' which implies mutation/write operations, but doesn't disclose critical behaviors like whether it processes files sequentially or in parallel, error handling, progress tracking, or resource usage. The mention of 'overwrite' parameter hints at destructive potential, but this isn't elaborated in the description itself.

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 a single, efficient sentence that directly states the tool's purpose without unnecessary words. It's appropriately sized and front-loaded with the core functionality.

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 batch processing tool with 5 parameters, nested objects, no annotations, and no output schema, the description is inadequate. It doesn't explain what 'audio processing operations' entail, how results are returned, error behavior, or performance characteristics. The context signals indicate complexity that isn't addressed in the minimal description.

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 description coverage is 100%, so the schema already documents all 5 parameters thoroughly. The description adds no additional parameter semantics beyond what's in the schema (e.g., it doesn't explain the 'operations' object structure or provide examples). Baseline 3 is appropriate when the schema does the heavy lifting.

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 clearly states the verb 'apply' and resource 'audio processing operations to multiple files in a directory', which is specific and actionable. However, it doesn't explicitly distinguish this batch processing tool from its sibling 'process_audio_file' (single-file processing), which would be needed for a perfect score.

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?

The description provides no guidance on when to use this tool versus alternatives like 'process_audio_file' (for single files) or other audio processing siblings. It mentions 'multiple files in a directory' but doesn't specify thresholds, prerequisites, or exclusions for batch versus single-file processing.

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

create_harmonicsC

Create harmonic variations by adding octaves and musical intervals

ParametersJSON Schema
NameRequiredDescriptionDefault
inputFileYesPath to input audio file
outputDirectoryYesDirectory for harmonic variations
octaveUpNoMix level for octave up (0-1)
octaveDownNoMix level for octave down (0-1)
fifthUpNoMix level for perfect fifth up (0-1)
thirdUpNoMix level for major third up (0-1)
overwriteNoWhether to overwrite existing output files

TDQS

C2.9/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. While 'create' implies a write operation, it doesn't specify whether this is a destructive or safe process, what permissions might be required, or how errors are handled. The description lacks details on output behavior, file formats, or any side effects, which is a significant gap for a tool with no annotation coverage.

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 a single, efficient sentence that directly states the tool's purpose without any fluff or redundancy. It's front-loaded with the core action and method, making it easy to parse quickly.

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, no annotations, and no output schema, the description is inadequate. It doesn't explain what 'harmonic variations' output looks like (e.g., file types, naming conventions), how the process works, or any prerequisites. Given the complexity and lack of structured data, more context is needed for the agent to use this tool effectively.

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 description coverage is 100%, so the schema already documents all parameters thoroughly. The description adds no additional parameter information beyond what's in the schema, such as explaining how the mix levels interact or what 'harmonic variations' entail. Baseline 3 is appropriate when the schema does the heavy lifting.

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 clearly states the action ('create harmonic variations') and the method ('by adding octaves and musical intervals'), which is specific and actionable. However, it doesn't explicitly differentiate this tool from sibling tools like 'generate_variations' or 'process_audio_file', which might have overlapping functionality in audio processing.

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?

The description provides no guidance on when to use this tool versus alternatives. With siblings like 'generate_variations', 'process_audio_file', and 'advanced_process', there's no indication of what makes this tool unique or when it's the appropriate choice, leaving the agent to guess based on tool names alone.

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

generate_variationsC

Generate multiple variations of a sound from a single input - perfect for creating sound families

ParametersJSON Schema
NameRequiredDescriptionDefault
inputFileYesPath to input audio file
outputDirectoryYesDirectory for output variations
countNoNumber of variations to generate (1-20)
pitchRangeNoPitch variation range in semitones (±)
volumeRangeNoVolume variation range in dB (±)
spectralRangeNoSpectral variation range in dB (±)
seedNoRandom seed for reproducible variations
overwriteNoWhether to overwrite existing output files

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions the tool generates variations but lacks details on permissions, rate limits, file formats, error handling, or output specifics (e.g., file naming, format). This is inadequate for a tool with 8 parameters and file operations, leaving significant gaps in understanding its behavior.

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 a single, efficient sentence that front-loads the core purpose. It wastes no words and is appropriately sized for the tool's complexity, making it easy for an agent to parse quickly.

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?

Given the tool's complexity (8 parameters, file operations, no annotations, no output schema), the description is insufficient. It doesn't cover behavioral aspects like file handling, output details, or error conditions. While concise, it fails to provide the completeness needed for an agent to confidently invoke this tool without additional context.

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 schema description coverage is 100%, so all parameters are documented in the schema. The description adds no additional parameter semantics beyond implying variation generation. It doesn't explain how parameters like 'pitchRange' or 'spectralRange' interact or affect the output, so it relies entirely on the schema, meeting the baseline for high coverage.

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 clearly states the tool's purpose: 'Generate multiple variations of a sound from a single input'. It specifies the verb ('generate'), resource ('variations of a sound'), and outcome ('creating sound families'). However, it doesn't explicitly differentiate from sibling tools like 'batch_process_audio' or 'process_audio_file', which might have overlapping functionality.

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?

The description provides minimal usage guidance: 'perfect for creating sound families' suggests a use case but doesn't specify when to use this tool versus alternatives like 'batch_process_audio' or 'create_harmonics'. No explicit when-not-to-use scenarios or prerequisites are mentioned, leaving the agent with little contextual direction.

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

get_queue_statusB

Get current status of the audio processing queue

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

TDQS

B3.2/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full burden. It states it 'gets' status, implying a read-only operation, but doesn't disclose behavioral traits such as whether it requires authentication, returns real-time or cached data, includes error states, or has rate limits. For a status-checking tool with zero annotation coverage, this leaves significant gaps in understanding its behavior.

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 a single, efficient sentence that front-loads the core purpose without any wasted words. It's appropriately sized for a simple status-checking tool, making it easy to parse and understand quickly.

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?

Given the tool's simplicity (0 parameters, no output schema), the description is minimally adequate. However, without annotations or output schema, it lacks details on what the status includes (e.g., queue length, processing times, errors) or behavioral context. For a status tool, this leaves room for improvement in completeness.

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?

The input schema has 0 parameters with 100% coverage, so no parameter documentation is needed. The description doesn't add parameter details, which is appropriate here. A baseline of 4 is applied for tools with zero parameters, as there's nothing to compensate for.

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 clearly states the verb ('Get') and resource ('current status of the audio processing queue'), making the purpose unambiguous. It doesn't explicitly distinguish from sibling tools like 'list_presets' or 'batch_process_audio', but the focus on queue status is specific enough to avoid confusion with those operations.

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?

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., whether audio processing must be active), exclusions, or how it differs from sibling tools like 'process_audio_file' or 'advanced_process' in terms of queue monitoring versus processing actions.

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

layer_soundsC

Layer multiple sounds together with advanced blending and timing

ParametersJSON Schema
NameRequiredDescriptionDefault
inputFilesYesArray of input file paths to layer
outputFileYesPath for output file
layersYesLayer configuration for each input
overwriteNoWhether to overwrite existing output files

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions 'advanced blending and timing' but fails to detail critical aspects like file format requirements, performance constraints, error handling, or output characteristics. For a tool with 4 parameters and file operations, this is a significant gap in transparency.

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 a single, efficient sentence that front-loads the core functionality ('Layer multiple sounds together') and adds key details ('with advanced blending and timing') without unnecessary elaboration. Every word earns its place, making it highly concise and well-structured.

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?

Given the tool's complexity (4 parameters, file operations, no annotations, and no output schema), the description is insufficient. It lacks details on output format, error conditions, or integration with sibling tools, leaving gaps that could hinder effective agent usage in a multi-tool audio processing context.

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 schema description coverage is 100%, so the schema fully documents all parameters. The description adds no additional meaning beyond the schema, such as explaining how 'blend' modes interact or the practical effects of 'delay' and 'pitch.' This meets the baseline for high schema coverage but doesn't enhance understanding.

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 clearly states the tool's purpose as 'Layer multiple sounds together with advanced blending and timing,' which specifies the verb ('layer') and resource ('sounds') with additional context about capabilities. However, it doesn't explicitly differentiate from sibling tools like 'batch_process_audio' or 'process_audio_file,' which may have overlapping audio processing functions.

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?

The description provides no guidance on when to use this tool versus alternatives. It lacks context about specific scenarios, prerequisites, or comparisons to sibling tools such as 'apply_preset' or 'generate_variations,' leaving the agent without clear usage direction.

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

list_presetsC

List all available audio processing presets with their descriptions

ParametersJSON Schema
NameRequiredDescriptionDefault
categoryNoFilter presets by category

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states it lists presets, implying a read-only operation, but doesn't cover aspects like whether it requires authentication, rate limits, pagination, or error handling. This leaves significant gaps for a tool with no annotation support.

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 a single, efficient sentence that directly states the tool's purpose without any wasted words. It is appropriately sized and front-loaded, making it easy to understand at a glance.

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?

Given no annotations and no output schema, the description is incomplete. It doesn't explain what the output looks like (e.g., list format, included fields like preset names and descriptions), behavioral traits, or usage context. For a tool with rich sibling tools and no structured support, this is 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?

The input schema has 100% description coverage, documenting the optional 'category' parameter with its enum values. The description adds no additional parameter semantics beyond what the schema provides, such as default behavior when no category is specified. Baseline 3 is appropriate as the schema does the heavy lifting.

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 clearly states the verb ('List') and resource ('audio processing presets') with their descriptions, making the purpose specific and understandable. However, it doesn't explicitly differentiate this tool from potential siblings like 'apply_preset' or 'process_audio_file' beyond the listing action.

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 is provided on when to use this tool versus alternatives. It doesn't mention prerequisites, such as needing presets to exist, or compare it to sibling tools like 'apply_preset' for applying presets or 'process_audio_file' for processing with presets.

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

process_audio_fileC

Apply audio processing operations to a single file using FFmpeg

ParametersJSON Schema
NameRequiredDescriptionDefault
inputFileYesPath to input audio file
outputFileYesPath for output file
operationsYesAudio processing operations to apply
overwriteNoWhether to overwrite existing output files

TDQS

C2.9/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions 'Apply audio processing operations' and 'using FFmpeg', which hints at mutation and external tool usage, but doesn't specify critical behaviors like whether it modifies files in-place, requires specific permissions, handles errors, or has performance constraints. For a tool with complex operations and no annotations, this is a significant gap in transparency.

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 a single, efficient sentence that front-loads the core purpose ('Apply audio processing operations to a single file using FFmpeg'). It wastes no words and is appropriately sized for the tool's complexity, making it easy to parse quickly. Every part of the sentence contributes essential 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?

Given the tool's complexity (4 parameters with nested objects, no output schema, and no annotations), the description is incomplete. It doesn't explain the output format, error handling, or behavioral traits like file system interactions or FFmpeg dependencies. With rich input schema but missing critical context for a mutation tool, the description fails to provide enough information for safe and effective use.

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 schema description coverage is 100%, with detailed descriptions for parameters like 'inputFile', 'outputFile', and 'overwrite', and nested objects for 'operations'. The description adds minimal value beyond the schema, as it only vaguely references 'audio processing operations' without explaining the structure or purpose of the 'operations' object. Given the high schema coverage, the baseline score of 3 is appropriate, as the description doesn't significantly enhance parameter understanding.

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 clearly states the action ('Apply audio processing operations') and resource ('to a single file using FFmpeg'), making the purpose understandable. However, it doesn't differentiate this tool from siblings like 'advanced_process', 'batch_process_audio', or 'apply_preset', which likely offer similar or overlapping functionality. The description is specific but lacks sibling distinction.

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?

The description provides no guidance on when to use this tool versus alternatives. With siblings like 'advanced_process', 'batch_process_audio', and 'apply_preset', an agent needs explicit direction on choosing this tool for single-file FFmpeg processing over others. The description implies usage for audio processing but offers no context about prerequisites, limitations, or comparisons to sibling tools.

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

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. 9 tool updatesv1.0.0
    • First observedadvanced_process
    • First observedapply_preset
    • First observedbatch_process_audio
    • First observedcreate_harmonics
    • First observedgenerate_variations
    • First observedget_queue_status
    • First observedlayer_sounds
    • First observedlist_presets
    • First observedprocess_audio_file

TDQS

B3.4/5.0
Disambiguation4/5

Most tools have distinct purposes, but 'advanced_process' and 'process_audio_file' could cause confusion since both handle audio processing operations. The descriptions help differentiate them (advanced vs. single-file FFmpeg-based), but the overlap in core functionality creates some ambiguity.

Naming Consistency5/5

All tools follow a consistent snake_case verb_noun pattern (e.g., 'apply_preset', 'batch_process_audio', 'layer_sounds'). The naming is predictable and readable throughout the set, with no deviations in style.

Tool Count5/5

With 9 tools, the count is well-scoped for an audio processing server. Each tool appears to serve a specific and useful function in the domain, from basic processing to advanced features like harmonics and variations, without feeling bloated or thin.

Completeness4/5

The tool set covers core audio processing workflows well, including single and batch processing, presets, sound layering, and queue management. A minor gap exists in lacking explicit tools for audio analysis or metadata handling, but agents can likely work around this with the provided operations.

Maintenance

ActivityInactive
ResponsivenessSyncing

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