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Benedict

TidalCycles MCP Server

by Benedict

tidal_eval

Evaluates a TidalCycles pattern on a selected audio channel (d1-d9) to produce algorithmic music. Use this to create and control sound patterns in real time.

Instructions

Evaluate a TidalCycles pattern on a specific channel (d1-d9). This is the main way to make music with Tidal.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
channelYesThe channel to evaluate on (d1, d2, ... d9)
patternYesThe TidalCycles pattern to evaluate (without the 'd1 $' prefix)
Behavior2/5

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

No annotations provided; description only states evaluation on a channel without disclosing side effects such as whether previous patterns on that channel are stopped, real-time audio behavior, or prerequisites like having TidalCycles running.

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?

Two sentences directly convey core purpose and a key usage note, but could be slightly more structured with additional behavioral context.

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?

No output schema; description omits important context like what happens when a pattern is evaluated (e.g., looping sound, replaces existing pattern), and prerequisites for use.

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 coverage is 100%, but the description adds value by specifying 'without the 'd1 $' prefix' for the pattern parameter, clarifying usage beyond the schema definition.

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 verb 'Evaluate' and the resource 'TidalCycles pattern on a specific channel (d1-d9)', and positions it as the main way to make music, distinguishing it from sibling tools like tidal_hush or tidal_solo.

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

Usage Guidelines3/5

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

It says 'This is the main way to make music with Tidal,' implying primary use, but lacks explicit when-to-use or when-not-to-use guidance, and does not mention alternatives among siblings.

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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