Get comprehensive metrics for the range. Args: user_id: Optional user ID (admin only) Returns: Range metrics (CPU, memory, disk, network usage)
AI agents call get_range_metrics to retrieve information from Ludus FastMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves monitoring/observability data about resource usage in a cyber range environment. It performs a query operation that returns metrics without creating, modifying, deleting, or executing anything. The optional user_id parameter appears to be for access control, not for altering data. This is a straightforward Read operation with minimal risk.
From the tool's definition Tool name 'get_range_metrics' and description 'Get comprehensive metrics for the range' with return values limited to 'Range metrics (CPU, memory, disk, network usage)' indicates data retrieval with no modification or side effects.
Risk signalsAdmin/system-level operation
Documented attack patterns abuse exactly the kind of access get_range_metrics gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ludus FastMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for get_range_metrics:
{
"version": "1",
"default": "deny",
"tools": {
"get_range_metrics": {}
}
}get_range_metrics is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get comprehensive metrics for the range. Args: user_id: Optional user ID (admin only) Returns: Range metrics (CPU, memory, disk, network usage). It is categorised as a Read tool in the Ludus FastMCP MCP Server, which means it retrieves data without modifying state.
Register the Ludus Fast MCP server in PolicyLayer and add a rule for get_range_metrics: 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 Ludus FastMCP. Nothing to install.
get_range_metrics 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 get_range_metrics 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 get_range_metrics. 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.
get_range_metrics is provided by the Ludus Fast MCP server (tjnull/ludus-fastmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 201 Ludus FastMCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
201 Ludus FastMCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.