AI agents call delete_range_by_user to permanently remove resources in Ludus FastMCP — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
The name explicitly includes 'delete,' which is a destructive operation. Given the server's context (Ludus cyber range environment management), this tool likely removes entire range configurations, user data, or associated resources. Such deletion is irreversible and has a significant blast radius in a security testing platform—an AI agent misusing this could destroy valuable test environments or audit trails.
From the tool's definition Tool name 'delete_range_by_user' contains 'delete' — an action that irreversibly removes data. The description is empty, but the name strongly indicates permanent removal of a cyber range environment, which cannot be undone.
Documented attack patterns abuse exactly the kind of access delete_range_by_user 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 delete_range_by_user:
{
"version": "1",
"default": "deny",
"hide": [
"delete_range_by_user"
]
}delete_range_by_user disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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delete_range_by_user. It is categorised as a Destructive tool in the Ludus FastMCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Ludus Fast MCP server in PolicyLayer and add a rule for delete_range_by_user: 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.
delete_range_by_user is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the delete_range_by_user 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 delete_range_by_user. 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.
delete_range_by_user 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.
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201 Ludus FastMCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.