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LacyLights MCP Server

by bbernstein

start_cue_list

Start playback of a LacyLights theatrical lighting cue list from the first cue or a specified cue number.

Instructions

Start playing a cue list from the beginning or a specific cue

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
cueListIdNoCue list ID to play
projectIdNoProject ID to search within (optional when using cueListName)
cueListNameNoCue list name to search for (alternative to ID)
startFromCueNoCue number to start from (optional, defaults to first cue)

Schema Changelog

Changes observed during successful MCP inspections.

  1. Addedv1.7.0

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. It never says whether this interrupts existing playback, whether it requires an active project, whether the call blocks until completion, or what state changes result from starting a cue list.

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?

One short sentence, front-loaded with the action and immediately qualifying the two start positions. No filler or redundancy.

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 four-parameter playback-control tool with no annotations and no output schema, the single sentence leaves too much unspecified: success/failure behavior, effect on currently running playback, and what status is returned are all unaddressed.

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 cueListId, projectId, cueListName, and startFromCue are all documented in the schema, including the ID/name alternative and the default-to-first-cue behavior. The description's phrase 'from the beginning or a specific cue' adds only marginal meaning beyond that.

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?

States a specific verb and resource ('Start playing a cue list') and scopes it ('from the beginning or a specific cue'). It is distinguishable from stop_cue_list and go_to_cue, though it never names those siblings explicitly.

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 versus go_to_cue, next_cue, or jump_to_operation, and no prerequisites stated. The agent must infer that this initiates playback rather than navigating within it.

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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