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Yarn ↔ Mojang class name translation

mc_mappings_translate

Translates Minecraft class names between Yarn and Mojang mappings to simplify porting mods across Fabric, NeoForge, and Minecraft versions.

Instructions

Given a class name from either Yarn (Fabric) or Mojang official (NeoForge / modern Fabric) mappings, returns the equivalent. Useful when porting between Fabric on Yarn and NeoForge on Mojang, or when reading a wiki snippet that uses the other naming.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYesClass name (any case, partial OK)
Behavior2/5

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

No annotations provided, so description carries full burden. It only states it returns equivalent, but doesn't disclose handling of invalid input, case sensitivity beyond schema, or error behavior.

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?

Two sentences, no fluff, front-loaded with purpose. Every word earns its place.

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?

Simple tool with one param; description explains purpose and use case well. Lacks output format details, but for a translation tool the return type is intuitive.

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 covers parameter 'name' with 100% coverage, adding 'any case, partial OK'. Description reinforces the mapping sources (Yarn/Mojang), adding marginal value beyond schema.

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 translates class names between Yarn and Mojang mappings, with specific contexts (porting, reading wiki). It distinguishes from siblings like mc_mappings_search and mc_translate.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides clear use cases (porting, reading wiki snippets) but doesn't explicitly exclude alternatives or state when not to use. Siblings cover different aspects, so distinction is implied.

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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