pixelblaze

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pixelblaze_set_control

Set the value of a named UI control on the active LED pattern. Accepts numeric values: 0.0–1.0 for sliders, 0 or 1 for toggles.

Instructions

Set the value of a UI control (slider, toggle, etc.) on the active pattern.

Args: name: The control variable name (as it appears in pixelblaze_get_controls). value: Numeric value (sliders: 0.0–1.0; toggles: 0 or 1).

Returns a confirmation message.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "name": "<name>",
      "value": "<value>"
    },
    "name": "pixelblaze_set_control"
  }
}

Input Schema

Name	Required	Description	Default
`name`	Yes
`value`	Yes

Output Schema

Name	Required	Description	Default
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

First observedv0.1.0Jul 13, 2026

TDQS

A4.2/5.0

Behavior3/5

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

With no annotations, the description carries the full burden. It specifies return type (confirmation message) and value ranges, but does not disclose prerequisites (e.g., must the pattern be active? what if control doesn't exist?) or side effects (e.g., immediate visual change).

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 concise (few sentences) with a clear Args section. Every sentence adds value, no redundancy.

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?

Given the tool's simplicity (2 required params, no enums, has output schema), the description is fairly complete. It could mention error handling or the requirement for an active pattern, but overall it provides adequate information.

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?

Input schema has 0% description coverage, so the description adds essential meaning: 'name' is the control variable name as from pixelblaze_get_controls, and 'value' is numeric with specific ranges per control type. This significantly aids correct usage.

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 action ('Set the value'), the resource ('UI control on the active pattern'), and provides specific examples (slider, toggle). It distinguishes from sibling tools like pixelblaze_set_brightness and pixelblaze_set_active_pattern.

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

Usage Guidelines4/5

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

The description implies when to use this tool (when you need to change a UI control value on the active pattern) but does not explicitly state when not to use it or mention alternatives like pixelblaze_get_controls for reading current values. The context is clear enough for typical use.

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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