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Unity MCP Claude Code

Unity MCP Claude Code

by MauricePutinas
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get_project_info_live

Retrieves live Unity project information including active build target, scripting defines, and active scenes. Runs the editor headlessly with an injected C# script and writes results to a file.

Instructions

Startet den Editor headless und liest Live-Infos (aktives BuildTarget, Scripting-Defines, aktive Szenen) via injiziertem C#-Skript. Läuft als Job; Ergebnis aus result_file lesen.

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": {
      "project_path": "<project_path>"
    },
    "name": "get_project_info_live"
  }
}

Input Schema

NameRequiredDescriptionDefault
project_pathYes
versionNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv2.1.0

TDQS

B3.2/5.0
Behavior3/5

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

Annotations indicate readOnlyHint=false and destructiveHint=false. The description adds that the tool starts the editor headless and injects a C# script, running as a job. It does not contradict annotations but lacks full disclosure on whether any persistent state changes occur.

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 extremely concise, consisting of two sentences that front-load the core purpose. Every sentence adds value without redundancy.

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?

The tool lacks an output schema and does not describe the return format or the location/format of the result file. Given the complexity of running a job and reading output, this omission makes the description incomplete for practical agent usage.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With 0% schema description coverage, the description should compensate but does not. It provides no details about the 'project_path' or 'version' parameters beyond their existence, leaving the agent without guidance on required format or constraints.

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 that the tool starts the editor headless and reads live info such as active BuildTarget, scripting defines, and active scenes. It distinguishes itself from the sibling 'get_project_info' by specifying it runs as a job and reads live data, but does not explicitly contrast with it.

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 obtaining live project info asynchronously via a job. However, it does not explicitly state when to use this tool over alternatives like 'get_project_info', nor does it provide exclusions or prerequisites.

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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