Compute first rise/fall times for a transient response.
AI agents call getRiseFallTime 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 extracts timing metrics from transient simulation results without modifying the simulation, schematic, or underlying data. It performs a computational analysis on existing results—a read-only operation with no side effects. The low severity reflects that misuse cannot cause unintended modifications or system damage.
From the tool's definition Tool name 'getRiseFallTime' and description 'Compute first rise/fall times for a transient response' indicates data extraction/querying of simulation results. Uses verb 'get' and 'compute' which are retrieval operations on existing simulation data.
Documented attack patterns abuse exactly the kind of access getRiseFallTime 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 getRiseFallTime:
{
"version": "1",
"default": "deny",
"tools": {
"getRiseFallTime": {}
}
}getRiseFallTime is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Compute first rise/fall times for a transient response. 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 getRiseFallTime: 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.
getRiseFallTime 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 getRiseFallTime 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 getRiseFallTime. 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.
getRiseFallTime 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.