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KiCad MCP Server (IPC API)

KiCad MCP Server (IPC API)

by lmaag182
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

add_mounting_hole

Add a circular mounting hole at specified coordinates on the Edge.Cuts layer to facilitate board mounting.

Instructions

Add circular mounting hole on Edge.Cuts.

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": {
      "x": "<x>",
      "y": "<y>"
    },
    "name": "add_mounting_hole"
  }
}

Input Schema

NameRequiredDescriptionDefault
xYes
yYes
diameterNo

Output Schema

NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.2.0

TDQS

C2.7/5.0
Behavior2/5

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

No annotations are provided, so the description must carry the burden. It only states the action but omits behavioral details such as whether the operation modifies the board, what happens if the hole already exists, or any 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.

Conciseness3/5

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

The description is a single sentence, which is concise but lacks structure. It provides the essential information but does not organize details like parameter explanation or output.

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?

Given three parameters, no annotations, and an output schema (not detailed), the description is insufficient. It does not cover prerequisites, return value, or typical use cases.

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

Parameters1/5

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

The input schema has zero description coverage for parameters, and the description does not explain the meaning or usage of x, y, or diameter. The default diameter value is not mentioned.

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 action (add), the object (circular mounting hole), and the specific layer (Edge.Cuts). It distinguishes the tool from siblings like add_board_outline or add_via.

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 versus alternatives such as add_via or other board modifications. There is no context about prerequisites or scenarios.

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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