Get detailed information about vectors in a plot.
AI agents call getVectorsInfo to retrieve information from Ltspice without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries information about simulation plot vectors without creating, modifying, deleting, or executing any operations. It is purely informational, consistent with the Read category for data retrieval actions. The severity is low because misuse cannot cause harm beyond information disclosure.
From the tool's definition Tool name 'getVectorsInfo' and description 'Get detailed information about vectors in a plot' indicate a retrieval operation with no modification or execution of commands.
Documented attack patterns abuse exactly the kind of access getVectorsInfo gives an agent:
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 getVectorsInfo:
{
"version": "1",
"default": "deny",
"tools": {
"getVectorsInfo": {}
}
}getVectorsInfo is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get detailed information about vectors in a plot. It is categorised as a Read tool in the Ltspice MCP Server, which means it retrieves data without modifying state.
Register the Ltspice MCP server in PolicyLayer and add a rule for getVectorsInfo: 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.
getVectorsInfo is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the getVectorsInfo 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.
Set action: deny in the PolicyLayer policy for getVectorsInfo. 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.
getVectorsInfo 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.
Start from Ltspice, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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