readLtspiceUiText

THE RISK

Low Risk

Why readLtspiceUiText needs a policy

This tool retrieves/queries UI text from an LTspice window—a read-only operation with no side effects. It does not create, modify, delete, execute commands, or move money. The macOS Accessibility API usage is for observation only. Severity is low because misuse would at worst expose visible UI content already on the user's screen, with minimal blast radius.

From the tool's definition Tool name 'readLtspiceUiText' and description 'Read visible LTspice window text using macOS Accessibility APIs' explicitly indicate data retrieval without modification or execution.

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

POLICY

How to control readLtspiceUiText

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

policy.json

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

readLtspiceUiText 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 Ltspice — 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 Ltspice tools

Destructive resetToolTelemetry Reset rolling performance telemetry for one tool or all tools. Destructive endLtspiceRenderSession Close the LTspice window associated with a render session. Execute cancelJob Request cancellation for a queued/running job. Execute daemonDoctor Run a daemon/system health check and return actionable recommendations. Execute runMeasAutomation Inject .meas directives into a netlist, run simulation, and parse measurement values. Execute runSimulation Run LTspice in batch mode for the currently loaded netlist. Execute runSweepStudy runSweepStudy Execute runVerificationPlan runVerificationPlan

All 71 Ltspice tools →

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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 readLtspiceUiText

What does the readLtspiceUiText tool do? +

Read visible LTspice window text using macOS Accessibility APIs. It is categorised as a Read tool in the Ltspice MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on readLtspiceUiText? +

Register the Ltspice MCP server in PolicyLayer and add a rule for readLtspiceUiText: 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 Ltspice. Nothing to install.

What risk level is readLtspiceUiText? +

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

Can I rate-limit readLtspiceUiText? +

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

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

readLtspiceUiText is provided by the Ltspice MCP server (xuio/ltspice-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Ltspice tool call.

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

CHECK YOUR STACK →