# delete_range

A destructive tool on the Ludus FastMCP MCP server.

Agent View of the PolicyLayer registry record for `delete_range`. HTML page: https://policylayer.com/tools/tjnull-ludus-fastmcp/delete-range

## Facts

- Tool: `delete_range`
- Server: Ludus FastMCP (`tjnull/ludus-fastmcp`) — https://policylayer.com/tools/tjnull-ludus-fastmcp.md
- Homepage: https://github.com/tjnull/Ludus-FastMCP
- Risk category: Destructive (Critical risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Hidden

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "delete_range",
    "arguments": {}
  }
}
```

## Why delete_range is rated Critical

The Ludus FastMCP server manages cyber range environments, and 'delete_range' would remove a range environment and its associated data irreversibly. This is a destructive operation that cannot be undone. While the description is empty (lowering confidence slightly), the tool name itself is explicit. The high confidence reflects the unambiguous destructive semantics of 'delete' applied to infrastructure resources.

From the tool's own definition: "Tool name is 'delete_range' with no description provided. The verb 'delete' combined with the object 'range' (a cyber range environment in the Ludus system) indicates irreversible removal of infrastructure resources."

## Use case

AI agents call delete_range 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.

## Recommended policy (PolicyLayer)

Verdict: **Hidden**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Ludus FastMCP:

```json
{
  "version": "1",
  "default": "deny",
  "hide": [
    "delete_range"
  ]
}
```

## Other tools on Ludus FastMCP (230)

- `abort_and_remove_range` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/abort-and-remove-range.md
- `abort_range_deployment` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/abort-range-deployment.md
- `batch_remove_snapshots` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/batch-remove-snapshots.md
- `cleanup_old_ranges` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/cleanup-old-ranges.md
- `clear_range_access` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/clear-range-access.md
- `delete_blueprint` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/delete-blueprint.md
- `delete_group` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/delete-group.md
- `delete_range_by_user` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/delete-range-by-user.md
- `delete_range_object` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/delete-range-object.md
- `delete_ranges_by_status` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/delete-ranges-by-status.md
- `delete_source` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/delete-source.md
- `delete_template` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/delete-template.md
- `destroy_vm` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/destroy-vm.md
- `remove_ranges_from_group` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/remove-ranges-from-group.md
- `remove_snapshot` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/remove-snapshot.md
- `remove_user` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/remove-user.md
- `remove_users_from_group` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/remove-users-from-group.md
- `revoke_range_access` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/revoke-range-access.md
- `revoke_range_from_user` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/revoke-range-from-user.md
- `rollback_snapshot` — Destructive — https://policylayer.com/tools/tjnull-ludus-fastmcp/rollback-snapshot.md
- `abort_template_build` — Execute — https://policylayer.com/tools/tjnull-ludus-fastmcp/abort-template-build.md
- `apply_adversary_profile` — Execute — https://policylayer.com/tools/tjnull-ludus-fastmcp/apply-adversary-profile.md
- `apply_blueprint_to_range` — Execute — https://policylayer.com/tools/tjnull-ludus-fastmcp/apply-blueprint-to-range.md
- `apply_defender_profile` — Execute — https://policylayer.com/tools/tjnull-ludus-fastmcp/apply-defender-profile.md
- `batch_power_on_hosts` — Execute — https://policylayer.com/tools/tjnull-ludus-fastmcp/batch-power-on-hosts.md
- `batch_snapshot_hosts` — Execute — https://policylayer.com/tools/tjnull-ludus-fastmcp/batch-snapshot-hosts.md
- `build_container_based_template` — Execute — https://policylayer.com/tools/tjnull-ludus-fastmcp/build-container-based-template.md
- `build_range_from_description` — Execute — https://policylayer.com/tools/tjnull-ludus-fastmcp/build-range-from-description.md
- `build_range_from_scratch` — Execute — https://policylayer.com/tools/tjnull-ludus-fastmcp/build-range-from-scratch.md
- `build_range_from_skeleton` — Execute — https://policylayer.com/tools/tjnull-ludus-fastmcp/build-range-from-skeleton.md
- …and 200 more: https://policylayer.com/tools/tjnull-ludus-fastmcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=tjnull-ludus-fastmcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/tjnull-ludus-fastmcp