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williamzujkowski

Strudel MCP Server

pause

Stop music playback in Strudel MCP Server to control audio generation and live coding sessions.

Instructions

Pause playback

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Implementation Reference

  • The handler logic for the 'pause' tool within the executeTool switch statement. It calls this.controller.stop() to pause playback. Note that it shares the implementation with the 'stop' tool.
    case 'stop':
      return await this.controller.stop();
  • The tool definition including name, description, and input schema (empty object, no parameters required). This is part of the tools array returned by getTools() for tool listing and registration.
    {
      name: 'pause',
      description: 'Pause playback',
      inputSchema: { type: 'object', properties: {} }
    },
  • Registration of the ListTools handler which exposes all tools including 'pause' via getTools().
    this.server.setRequestHandler(ListToolsRequestSchema, async () => ({
      tools: this.getTools()
    }));
  • The general CallToolRequestSchema handler that dispatches to executeTool based on tool name, with performance monitoring.
    const result = await this.perfMonitor.measureAsync(
      name,
      () => this.executeTool(name, args)
    );
  • 'pause' is listed in tools requiring browser initialization.
    const toolsRequiringInit = [
      'write', 'append', 'insert', 'replace', 'play', 'pause', 'stop',
      'clear', 'get_pattern', 'analyze', 'analyze_spectrum', 'analyze_rhythm',
      'transpose', 'reverse', 'stretch', 'humanize', 'generate_variation',
      'add_effect', 'add_swing', 'set_tempo', 'save', 'undo', 'redo',
      'validate_pattern_runtime'
    ];
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. 'Pause playback' implies a state change but doesn't disclose behavioral traits such as whether playback can be resumed, if it affects other operations, or what happens if no playback is active. This is a significant gap for a mutation tool with zero 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 extremely concise with two words, front-loaded and zero waste. Every word earns its place by directly conveying the core action, making it efficient and easy to parse.

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 simplicity (0 parameters, no output schema), the description is minimal but incomplete. It lacks context about behavior, usage guidelines, or interaction with siblings like 'stop', which is inadequate for a mutation tool in a complex audio processing environment with many alternatives.

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 tool has 0 parameters, and schema description coverage is 100%, so no parameter documentation is needed. The description doesn't add parameter semantics, but this is acceptable given the lack of parameters, warranting a baseline score of 4.

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

Purpose3/5

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

The description 'Pause playback' clearly states the action (pause) and target (playback), making the purpose understandable. However, it doesn't distinguish this tool from sibling tools like 'stop' or 'play', leaving room for ambiguity about when to use pause versus stop.

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 'stop' or 'play'. It lacks context about prerequisites (e.g., requires active playback) or exclusions, leaving the agent to infer usage from the name alone.

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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