add_hierarchical_sheet

SERVERKiCAD-MCP-Server SOURCEmixelpixx/kicad-mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mixelpixx-kicad-mcp-server/add-hierarchical-sheet.md

WHAT IT DOES

What add_hierarchical_sheet does on KiCAD-MCP-Server

AI agents use add_hierarchical_sheet to create or update resources in KiCAD-MCP-Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your KiCAD-MCP-Server environment.

RISK

Why add_hierarchical_sheet is rated Medium

The tool creates and modifies schematic structure by inserting hierarchical sheet references and updating internal references. While it changes the design, these modifications are reversible (sheets can be removed, references can be re-corrected). It does not execute code, delete irreversibly, or move money.

From the tool's definition Tool performs 'Insert', 'Adds', and 'fixes' operations on schematic data - creating new sheet reference blocks and modifying sheet_instances and component paths. These are reversible modifications to design files.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_hierarchical_sheet safely

PolicyLayer is an MCP gateway: it sits between your AI agents and KiCAD-MCP-Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For add_hierarchical_sheet, this is the rule to start with:

add_hierarchical_sheet Rate-limited

add_hierarchical_sheet stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_hierarchical_sheet": {
      "limits": [
        {
          "counter": "add_hierarchical_sheet_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect KiCAD-MCP-Server, apply this rule, and every add_hierarchical_sheet call is checked against it from then on.

FAQ

Questions about add_hierarchical_sheet

What does the add_hierarchical_sheet tool do? +

Insert a hierarchical-sheet reference block into a parent schematic, pointing at an existing sub-sheet file. Adds the sheet box, name/file fields, a sheet_instances path entry on the next page number, and fixes sub-sheet component instance paths so ERC resolves references. It is categorised as a Write tool in the KiCAD-MCP-Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_hierarchical_sheet? +

Register the KiCAD-MCP-Server MCP server in PolicyLayer and add a rule for add_hierarchical_sheet: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches KiCAD-MCP-Server. Nothing to install.

What risk level is add_hierarchical_sheet? +

add_hierarchical_sheet is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit add_hierarchical_sheet? +

Yes. Add a rate_limit block to the add_hierarchical_sheet rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block add_hierarchical_sheet completely? +

Set action: deny in the PolicyLayer policy for add_hierarchical_sheet. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides add_hierarchical_sheet? +

add_hierarchical_sheet is provided by the KiCAD-MCP-Server MCP server (mixelpixx/kicad-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on KiCAD-MCP-Server, and thousands of servers like it.

This server

All 231 KiCAD-MCP-Server tools →

Across the catalogue

add-tag on Kanban MCP Server →kb_add on Persistent Kb → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →