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Minecraft Structure Lab

Minecraft Structure Lab

by ewitulsk
OverviewSchemaSourceRelated ServersDiscussionsAdmin
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validate_structure

Checks compressed NBT structures against Minecraft's registry and limits to identify errors before use.

Instructions

Validate an existing compressed NBT structure against the game's registry and limits.

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": {
      "path": "<path>"
    },
    "name": "validate_structure"
  }
}

Input Schema

NameRequiredDescriptionDefault
pathYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.2.0

TDQS

A3.7/5.0
Behavior3/5

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

No annotations are provided, so the description carries full burden. It says 'validate' but does not disclose whether the tool is read-only or if it modifies the structure, nor does it mention error behavior or side effects.

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 no unnecessary information.

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?

There is no output schema or annotation, and the description does not explain what the validation result looks like (e.g., success/failure messages, error codes, or log output). It is adequate for a basic understanding but lacks completeness for an agent to anticipate the tool's full behavior.

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?

The schema provides only a 'path' parameter with no description. The tool description mentions 'existing compressed NBT structure', giving some context that path should point to such a file, but it lacks details on file format, required extensions, or any constraints on the path.

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 the tool validates an existing compressed NBT structure against the game's registry and limits, distinguishing it from generation, export, or submission tools.

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 a validation use case but does not explicitly state when to use this tool over alternatives like inspect_blocks or export_structure, nor does it mention when not to use it.

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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