List variables/parameters in the function. Returns a variables array.
AI agents call list_vars to retrieve information from CutterMCP-plus without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and enumerates metadata (variables and parameters) from a function being analyzed in Cutter. It performs a query operation on static analysis data without executing code, modifying binaries, or triggering external actions.
From the tool's definition Tool name 'list_vars' and description 'List variables/parameters in the function. Returns a variables array.' indicate a retrieval operation with no modification or side effects.
Documented attack patterns abuse exactly the kind of access list_vars gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and CutterMCP-plus, and nothing reaches the server without passing your rules. This is the rule we recommend for list_vars:
{
"version": "1",
"default": "deny",
"tools": {
"list_vars": {}
}
}list_vars is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List variables/parameters in the function. Returns a variables array. It is categorised as a Read tool in the CutterMCP-plus MCP Server, which means it retrieves data without modifying state.
Register the CutterMCP-plus MCP server in PolicyLayer and add a rule for list_vars: 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 CutterMCP-plus. Nothing to install.
list_vars 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 list_vars 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 list_vars. 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.
list_vars is provided by the CutterMCP-plus MCP server (restkhz/cuttermcp-plus). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 20 CutterMCP-plus tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
20 CutterMCP-plus tools catalogued and risk-classified — across an index of 42,500+ MCP servers.