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risnake

minecraft-mcp-server

by risnake

set_gamerule

Change any Minecraft game rule, like doDaylightCycle or keepInventory, by specifying the rule name and desired value.

Instructions

Set a game rule to a specific value.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
ruleYesGame rule name (e.g. 'doDaylightCycle', 'keepInventory')
valueYesGame rule value (string, integer, or boolean)
Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only says 'set a game rule to a specific value' without mentioning side effects, required permissions, error handling, or how the game state changes. This is minimal for a mutation tool.

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 sentence that is front-loaded with the verb 'set' and the target 'game rule', containing no unnecessary words or repetition.

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 tool is simple and has comprehensive schema coverage, making the description minimally sufficient. However, it lacks any note about game rule availability, value validation, or effects on the server, which would improve completeness.

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 descriptions fully cover both parameters (rule and value) with examples and types, and the description adds no additional semantic meaning beyond restating 'specific value'. Since schema coverage is 100%, the baseline of 3 applies.

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 identifies the action (set) and target (game rule), and the context of sibling tools like set_time/set_weather confirms it's specifically for game rules, distinguishing it from other setter 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?

No explicit guidance is given on when to use this tool versus alternatives, but the name and description imply it is for changing game rules. It does not mention exclusions or scenarios where other tools should be preferred.

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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