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KiCad MCP Server

KiCad MCP Server

by brovk2008
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

get_custom_design_rules

Fetch custom design rules text and identify any parsing errors for KiCad 11+ boards. Validate rule definitions and syntax.

Instructions

Get custom design rules text and any parsing errors (KiCad 11+).

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "get_custom_design_rules"
  }
}

Input Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.7/5.0
Behavior2/5

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

No annotations are provided, and the description does not disclose behavioral traits such as read-only nature, side effects, or required permissions. It mentions returning text and errors but lacks detail on output structure or edge cases like no custom rules. Significant gap.

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 with no wasted words. It includes essential information (what is returned and version) in a front-loaded manner.

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?

With no parameters and no output schema, the description partially explains the return (text and errors) but omits the format or structure. For a simple getter, it is adequate but not fully complete—additional details on the output would improve usability.

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

Parameters4/5

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

The tool has no parameters, and schema coverage is 100% (empty). The description adds minimal value beyond the schema by specifying the return type (text and parsing errors) and version (KiCad 11+), which is reasonable for a parameterless tool.

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 retrieves custom design rules text and parsing errors, specific to KiCad 11+. The verb 'Get' and resource 'custom design rules' are precise, and it distinguishes from sibling tools like get_design_rules and set_custom_design_rules.

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 does not explicitly provide when to use this tool versus alternatives. While the name implies it's for custom rules, there is no guidance on excluding standard rules or when to use get_design_rules. Usage context is only 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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