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RPG Maker MV MCP Server

RPG Maker MV MCP Server

by Xerolo44
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

Write plugin source

write_plugin

Replace the entire JavaScript source of an existing RPG Maker MV plugin with new code.

Instructions

Overwrite the JavaScript source of an existing js/plugins/.js.

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": {
      "name": "<name>",
      "code": "<code>"
    },
    "name": "write_plugin"
  }
}

Input Schema

NameRequiredDescriptionDefault
codeYesComplete new file contents
nameYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

B3.1/5.0
Behavior2/5

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

No annotations are provided, so the description must disclose behavioral traits. It indicates a destructive overwrite but does not mention backup behavior, validation, permissions, or side effects. The description is insufficient 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.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence with no fluff, but could be more informative without increasing length significantly. Effective minimalism, but under-specified.

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?

No output schema and no annotations. For a destructive write tool, critical details like error handling, return value, and file existence checks are missing. The description is incomplete for safe agent usage.

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 50% (only 'code' has description). The description adds context for 'name' by showing its usage in the file path pattern, but for 'code' it only repeats the schema description. Partial compensation.

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 verb 'Overwrite' and the resource 'JavaScript source of an existing js/plugins/<name>.js', specifying the file path pattern, which distinguishes it from sibling tools like create_plugin or read_plugin.

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?

No guidance on when to use this tool vs alternatives, no prerequisites or exclusions provided. The description simply states what it does without contextual usage instructions.

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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