list_schematic_texts

THE RISK

Low Risk

Why list_schematic_texts needs a policy

This tool retrieves and displays text annotations from a KiCAD schematic without any side effects. It is a read-only query operation that has no ability to modify, create, or delete data. The blast radius of misuse is minimal—an AI agent can only view existing documentation strings, which poses no security or integrity risk to the design.

From the tool's definition Tool name 'list_schematic_texts' and description 'List all free-form text annotations' indicate retrieval/querying of existing data with no modification, deletion, or execution.

Documented attack patterns abuse exactly the kind of access list_schematic_texts gives an agent:

POLICY

How to control list_schematic_texts

PolicyLayer is an MCP gateway — it sits between your AI agents and KiCAD-MCP-Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_schematic_texts:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_schematic_texts": {}
  }
}

list_schematic_texts is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register KiCAD-MCP-Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More KiCAD-MCP-Server tools

Destructive delete_component Remove a component from the PCB by its reference designator. Destructive delete_schematic_component Remove a placed symbol from a KiCAD schematic (.kicad_sch). This removes the symbol insta Destructive delete_schematic_net_label Remove a net label from the schematic. Destructive delete_schematic_wire Remove a wire from the schematic by start and end coordinates. Destructive delete_symbol Remove a symbol from a .kicad_sym library file. Destructive delete_trace Delete traces from the PCB. Can delete by UUID, position, or bulk-delete all traces on a n Destructive remove_schematic_component_property Remove a single custom property from a placed schematic symbol. Built-in fields (Referenc Execute autoroute Run Freerouting autorouter on the current PCB. Exports to Specctra DSN, runs Freerouting C

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list_schematic_texts

What does the list_schematic_texts tool do? +

List all free-form text annotations (notes, headings, documentation strings) in the schematic. It is categorised as a Read tool in the KiCAD-MCP-Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_schematic_texts? +

Register the KiCAD-MCP-Server MCP server in PolicyLayer and add a rule for list_schematic_texts: 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 list_schematic_texts? +

list_schematic_texts is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_schematic_texts? +

Yes. Add a rate_limit block to the list_schematic_texts 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 list_schematic_texts completely? +

Set action: deny in the PolicyLayer policy for list_schematic_texts. 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 list_schematic_texts? +

list_schematic_texts 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.

Enforce policy on every KiCAD-MCP-Server tool call.

Start from KiCAD-MCP-Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →