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Jelloeater

ulanzi-mcp

get_apps_in_loop

Retrieve the names of all apps currently cycling on your Ulanzi Smart Pixel Clock display. Optionally target a specific clock by index.

Instructions

Get list of all apps in the display rotation loop.

Returns the names of all apps that cycle through on the display.

Args: clock_index: Optional index of clock to target (0-based). Defaults to first clock.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
clock_indexNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

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 the tool returns app names but does not explicitly confirm it is read-only (no side effects). It also lacks details on prerequisites or behavior under different states (e.g., if clock is off).

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 very concise: two sentences plus a clear args explanation. The purpose is front-loaded, and every sentence adds value.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple tool with one optional parameter and an output schema (context confirms it exists), the description covers the return value and parameter. It is nearly complete, though it could mention that the operation is read-only to improve 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 description adds meaning beyond the input schema by explaining the 'clock_index' parameter: 'Optional index of clock to target (0-based). Defaults to first clock.' Schema coverage is 0%, so the description compensates well.

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 'Get list of all apps in the display rotation loop', using a specific verb and resource. It distinguishes from sibling tools like 'next_app' or 'switch_to_app' which are about navigation, not listing.

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?

The description implies usage for retrieving app names, but provides no explicit guidance on when to use this tool versus alternatives like 'get_clock_settings' or 'next_app'. No exclusions or context for when not to use 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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