Compute -drop_db bandwidth for an AC response vector.
AI agents call getBandwidth 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 reads and analyzes AC simulation results to compute a derived metric (bandwidth at -3dB point). It has no side effects, does not modify the schematic or simulation state, does not execute code or shell commands, and does not delete or create data. It is purely a data retrieval and computation function, consistent with the Read category.
From the tool's definition 'Compute -drop_db bandwidth for an AC response vector' — describes a calculation/analysis operation that extracts bandwidth metrics from existing simulation data without modifying, deleting, or executing external operations.
Documented attack patterns abuse exactly the kind of access getBandwidth 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 getBandwidth:
{
"version": "1",
"default": "deny",
"tools": {
"getBandwidth": {}
}
}getBandwidth is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Compute -drop_db bandwidth for an AC response vector. 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 getBandwidth: 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.
getBandwidth 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 getBandwidth 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 getBandwidth. 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.
getBandwidth 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.
Free to start. No card required.
71 Ltspice tools catalogued and risk-classified — across an index of 43,000+ MCP servers.