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Phaser Editor MCP Server

Phaser Editor MCP Server

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by phaserjs
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TypeScript
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scene-add-object-list

Create an array of game object IDs to group objects for purposes like arcade physics colliders in a scene.

Instructions

Create an Object List, which is an array with the ids of game objects. The user can use this array to group objects for a purpose. One of the most common purpose of objects lists are grouping the objects to be part of an arcade physics colliders.

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": {
      "sceneId": "<sceneId>",
      "lists": "<lists>"
    },
    "name": "scene-add-object-list"
  }
}

Input Schema

NameRequiredDescriptionDefault
listsYesThe object lists to add to the scene.
sceneIdYesThe `id` of the scene. The `id` is not the name of the scene, else a unique identifier is set in the scene data. You need to read the scene data to get the `id`.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.6

TDQS

B3.2/5.0
Behavior2/5

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

No annotations are provided, so the description carries full burden. It merely states the creation action without disclosing side effects, permissions, or constraints beyond what is in the schema (e.g., needing to read scene data for id). The write nature is implied but not explicitly stated.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise at two sentences, but contains a minor grammatical awkwardness ('One of the most common purpose'). Still, it is front-loaded and efficiently communicates core purpose.

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?

The description covers basic purpose but lacks prerequisites (e.g., scene must exist, objectIds must reference valid objects), return value information, and how the list integrates with other tools. Given no output schema, more context would be beneficial.

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 100%, baseline is 3. The description adds example context (physics colliders) but does not provide new semantic meaning beyond the schema's parameter descriptions.

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

Purpose4/5

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

The description clearly states it creates an Object List (an array of object ids) for grouping objects, and gives a common use case (physics colliders). However, it does not explicitly differentiate from sibling tools like scene-update-object-list or scene-remove-object-list.

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 creating new object lists via the creation verb and example use case, but no explicit guidance on when to use vs. alternatives (e.g., update/remove). The agent must infer from context.

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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