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by RBG-WebDesign
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TypeScript
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pp_volume_spawn

Spawn a PostProcessVolume to apply visual effects like bloom, color grading, depth of field, and more. Control settings and apply to entire level or bounded area.

Instructions

Spawn a PostProcessVolume with full settings control. Supports bloom, exposure, color grading, DOF, chromatic aberration, grain, vignette, motion blur, SSR, lens flare, and more.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "pp_volume_spawn"
  }
}

Input Schema

NameRequiredDescriptionDefault
nameNoActor labelPP_Effect
enabledNo
unboundNoAffect entire level
locationNoSpawn location (default: origin)
priorityNoPriority when overlapping
settingsNoPost-process settings. Every field auto-enables its override flag.
blend_radiusNoBlend radius when bounded
blend_weightNoEffect strength 0-1

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.4.0

TDQS

A3.5/5.0
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 of behavioral disclosure. It explains that the tool spawns a volume with settings control, but does not mention side effects such as unbound affecting the entire level, auto-enabling override flags, default values, or any potential performance impact. Absence of this contextual information leaves the agent without a clear behavioral profile.

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 a single, tightly written sentence that front-loads the verb and resource, then lists supported effects concisely. No filler or repetition; every word contributes to the tool's purpose and capabilities.

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

Completeness3/5

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

Despite the large nested settings object, the description remains generic. It omits critical context like the fact that all settings are optional, the volume defaults to unbound (affecting the whole level), and how blend weight/radius interact. The schema covers details, but the description does not tie the tool's behavior to broader use cases (e.g., cinematic, immersive effects). A bit more context would improve completeness.

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 high (88%), so the baseline is 3. The description lists high-level effect categories but does not add meaning to individual parameters beyond what the schema already provides. It does not compensate for the few undocumented parameters or explain relationships between settings, so no extra value is added.

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 opens with 'Spawn a PostProcessVolume with full settings control', using a specific verb ('Spawn') and resource ('PostProcessVolume'). It lists supported effects (bloom, exposure, DOF, etc.), which clearly distinguishes it from sibling tools like pp_volume_modify (modify existing) and pp_preset (apply presets).

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 the use case: creating a new PostProcessVolume with extensive settings. However, it does not explicitly state when to use this tool versus alternatives like pp_volume_modify or pp_preset, and provides no exclusion criteria. The 'Spawn' phrasing gives clear context, but no direct comparison or guidance.

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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