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pixelblaze

pixelblaze

by tomnz
OverviewSchemaSourceRelated ServersDiscussionsAdmin
JavaScript
Local

pixelblaze_set_brightness

Adjust the global brightness of your PixelBlaze LED controller by passing a value from 0.0 (off) to 1.0 (full brightness).

Instructions

Set the global brightness of the PixelBlaze.

Args: value: Brightness level from 0.0 (off) to 1.0 (full brightness).

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": {
      "value": "<value>"
    },
    "name": "pixelblaze_set_brightness"
  }
}

Input Schema

NameRequiredDescriptionDefault
valueYes

Output Schema

NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.6/5.0
Behavior2/5

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

With no annotations, the description must fully disclose behavioral traits. It only mentions 'Returns a confirmation message', but omits critical details like idempotency, persistence of the setting, whether it requires an active connection, or the effect of invalid values. This leaves the agent guessing.

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 two sentences: one stating the purpose and one explaining the parameter and return. It is front-loaded, efficient, and contains no fluff. Every sentence is necessary and informative.

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 (single parameter, output schema exists), the description provides adequate context. It explains the parameter and the return value. It could be slightly more complete by noting that the brightness is set immediately or globally applies, but overall it's sufficient.

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 explains the single parameter 'value' with a clear range (0.0 off to 1.0 full) and purpose. Since the input schema has no description (0% coverage), the description fully compensates by adding meaning. However, it could mention type constraints (e.g., numeric) but that's standard.

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 'Set' and the resource 'global brightness of the PixelBlaze', making the purpose immediately obvious. It distinguishes this tool from siblings like 'pixelblaze_set_active_pattern' or 'pixelblaze_set_control' by focusing specifically on global brightness.

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 is provided on when to use this tool versus alternatives. For instance, the sibling 'pixelblaze_set_control' might also affect brightness, but there is no clarification. There are no examples, prerequisites, or when-not-to-use instructions.

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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