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Unity MCP Server

Unity MCP Server

by rachitkumarrastogi
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

get_scene_summary

Get a summary of a Unity scene: root GameObject names and approximate component count. Specify the scene path relative to the project.

Instructions

Get a short summary of a scene: root GameObject names and approximate component count.

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": {
      "scene_path": "<scene_path>"
    },
    "name": "get_scene_summary"
  }
}

Input Schema

NameRequiredDescriptionDefault
scene_pathYesPath relative to project, e.g. Assets/Scenes/Main.unity

Schema Changelog

Changes observed during successful MCP inspections.

  1. Addedv1.5.2
  2. Removedv1.5.1
  3. Addedv1.5.0

TDQS

A3.6/5.0
Behavior3/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It implies a read operation but does not explicitly state it, nor does it mention performance implications, caching, or access requirements. The description is basic and adds minimal transparency beyond the obvious.

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 concise sentence that front-loads the purpose and includes key details (root GameObject names, component count). Every word contributes value without waste.

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?

For a simple tool with one parameter and no output schema, the description adequately covers the return value (root GameObject names and component count). It is sufficient for context among 50+ siblings, though the exact response format is left vague. Slightly above baseline due to addressing sibling differentiation implicitly.

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 coverage is 100%, so the schema already documents the single parameter (scene_path) with its type and description. The description does not add further meaning, examples, or constraints beyond what the schema provides, resulting in a baseline score of 3.

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 it retrieves a short summary of a scene, listing root GameObject names and approximate component count, which distinguishes it from siblings like get_scene_hierarchy_flat (full hierarchy) and get_scene_components_by_type (components by type).

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?

The description does not provide any guidance on when to use this tool versus alternatives, nor does it mention any prerequisites or exclusions. It only states what the tool does without contextual usage advice.

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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