clear_range_access

THE RISK

Critical Risk

Clearing all range access permissions is an irreversible bulk operation that removes all access controls for a cyber range environment. This cannot be easily undone and could lock out all users or expose systems, making it a destructive action with high blast radius.

From the tool's definition Clear all range access permissions

Risk signalsBulk/mass operation — affects multiple targets · Admin/system-level operation

Documented attack patterns abuse exactly the kind of access clear_range_access gives an agent:

HOW TO CONTROL CLEAR_RANGE_ACCESS

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 clear_range_access:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "clear_range_access"
  ]
}

clear_range_access disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register Ludus FastMCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

More Ludus FastMCP tools

Destructive abort_and_remove_range Abort any active deployment and then remove the range. This is a convenie Destructive batch_remove_snapshots Remove snapshots from multiple VMs in parallel. Args: vm_names: List Destructive bulk_vm_operations Perform bulk operations on multiple VMs. Args: operation: Operation t Destructive delete_blueprint Delete a blueprint. Args: blueprint_id: ID of the blueprint to delete Destructive delete_group Delete a group. Args: group_name: Name of the group to delete Destructive delete_range Delete the entire range. Permanently removes the range and all associated VMs, sn Destructive delete_range_by_user delete_range_by_user Destructive delete_ranges_by_status delete_ranges_by_status

All 201 Ludus FastMCP tools →

Destructive tools on other servers

Frida Game Hacking MCP clear_scan MegaMemory remove_concept Frida Agent MCP kill_app 1MCP Server mcp_uninstall

Go deeper

Critical-risk tools in Ludus FastMCP → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

What does the clear_range_access tool do? +

Clear all range access permissions. Args: user_id: Optional user ID (admin only) Returns: Clear result. 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.

How do I enforce a policy on clear_range_access? +

Register the Ludus Fast MCP server in PolicyLayer and add a rule for clear_range_access: 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.

What risk level is clear_range_access? +

clear_range_access is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit clear_range_access? +

Yes. Add a rate_limit block to the clear_range_access 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.

How do I block clear_range_access completely? +

Set action: deny in the PolicyLayer policy for clear_range_access. 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.

What MCP server provides clear_range_access? +

clear_range_access 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.

Enforce policy on every Ludus FastMCP tool call.

Deterministic rules across all 201 Ludus FastMCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

GOVERN LUDUS FASTMCP →

Free to start. No card required.

201 Ludus FastMCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

// WHAT CLEAR_RANGE_ACCESS ON LUDUS FASTMCP DOES

// THE RISK

// HOW TO CONTROL CLEAR_RANGE_ACCESS

// EXPLORE