AI agents call hfss_list_projects to retrieve information from HFSS MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about currently active HFSS simulation sessions. It performs a read-only query operation with no ability to modify, delete, or execute code. The blast radius of misuse is minimal—an agent could gain visibility into active projects but cannot manipulate them. This is a straightforward data retrieval function, placing it firmly in the Read category.
From the tool's definition Tool name 'hfss_list_projects' and description 'List all active HFSS sessions' indicate a query/retrieval operation with no modification or side effects.
Documented attack patterns abuse exactly the kind of access hfss_list_projects gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and HFSS MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for hfss_list_projects:
{
"version": "1",
"default": "deny",
"tools": {
"hfss_list_projects": {}
}
}hfss_list_projects is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all active HFSS sessions. It is categorised as a Read tool in the HFSS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the HFSS MCP Server MCP server in PolicyLayer and add a rule for hfss_list_projects: 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 HFSS MCP Server. Nothing to install.
hfss_list_projects 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 hfss_list_projects 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 hfss_list_projects. 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.
hfss_list_projects is provided by the HFSS MCP Server MCP server (leonardwy/hfss_mcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from HFSS MCP Server, 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.
28 HFSS MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.