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playcanvas

PlayCanvas Editor MCP Server

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by playcanvas

query_scene_settings

Retrieve scene settings within the PlayCanvas Editor to configure and manage 3D web application environments for real-time development.

Instructions

Query the scene settings

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Implementation Reference

  • Registers the 'query_scene_settings' MCP tool with an empty input schema and a handler that delegates to the WebSocket server.
    mcp.tool(
        'query_scene_settings',
        'Query the scene settings',
        {},
        () => {
            return wss.call('scene:settings:modify', {});
        }
    );
  • Inline handler function that executes the tool logic by calling wss.call with an empty object (note: endpoint is 'scene:settings:modify', which may be intended for querying).
    () => {
        return wss.call('scene:settings:modify', {});
    }
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. 'Query' suggests a read-only operation, but the description does not confirm this or detail any behavioral traits like permissions, rate limits, or response format. It lacks context on what 'scene settings' include or how the query is performed.

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, clear sentence with zero waste: 'Query the scene settings'. It is front-loaded and appropriately sized for a tool with no parameters, making it highly concise and well-structured.

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?

Given the lack of annotations and output schema, the description is incomplete. It does not explain what 'scene settings' are, what the query returns, or any behavioral aspects. For a tool with no structured data to rely on, the description should provide more context to be fully helpful.

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 input schema has 0 parameters with 100% coverage, so no parameter documentation is needed. The description does not add parameter details, which is appropriate, earning a baseline score of 4 for adequately handling the absence of parameters without introducing confusion.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose2/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'Query the scene settings' restates the tool name 'query_scene_settings' with minimal elaboration, making it tautological. It specifies the verb 'query' and resource 'scene settings' but lacks detail on what scene settings are or what querying entails, failing to distinguish it from sibling tools like 'modify_scene_settings'.

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. It does not mention prerequisites, context, or exclusions, such as when to choose 'list_entities' or 'modify_scene_settings' instead. The description implies a read operation but offers no explicit usage 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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