# list_model_categories

List available Thingiverse content categories.

Agent View of the PolicyLayer registry record for `list_model_categories`. HTML page: https://policylayer.com/tools/kiln/list-model-categories

## Facts

- Tool: `list_model_categories`
- Server: Kiln (`codeofaxel/Kiln`) — https://policylayer.com/tools/kiln.md
- Homepage: https://github.com/codeofaxel/Kiln
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

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

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

## Why list_model_categories is rated Low

This tool retrieves publicly available categorical metadata from Thingiverse. It performs a simple enumeration with no capability to modify, delete, execute code, or trigger printer operations. The blast radius of misuse is negligible—an AI agent cannot cause harm by listing categories.

From the tool's own definition: "Tool name 'list_model_categories' and description 'List available Thingiverse content categories' indicate a query/retrieval operation with no side effects."

## Use case

AI agents call list_model_categories to retrieve information from Kiln without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_model_categories": {}
  }
}
```

## Other tools on Kiln (401)

- `cancel_print` — Destructive — https://policylayer.com/tools/kiln/cancel-print.md
- `cancel_print_recovery` — Destructive — https://policylayer.com/tools/kiln/cancel-print-recovery.md
- `cancel_print_service_order` — Destructive — https://policylayer.com/tools/kiln/cancel-print-service-order.md
- `cancel_split_plan` — Destructive — https://policylayer.com/tools/kiln/cancel-split-plan.md
- `delete_agent_note` — Destructive — https://policylayer.com/tools/kiln/delete-agent-note.md
- `delete_cached_model` — Destructive — https://policylayer.com/tools/kiln/delete-cached-model.md
- `delete_file` — Destructive — https://policylayer.com/tools/kiln/delete-file.md
- `delete_shipping_profile` — Destructive — https://policylayer.com/tools/kiln/delete-shipping-profile.md
- `fulfillment_cancel` — Destructive — https://policylayer.com/tools/kiln/fulfillment-cancel.md
- `remove_mesh_floating_regions` — Destructive — https://policylayer.com/tools/kiln/remove-mesh-floating-regions.md
- `remove_spool` — Destructive — https://policylayer.com/tools/kiln/remove-spool.md
- `rollback_design_version` — Destructive — https://policylayer.com/tools/kiln/rollback-design-version.md
- `rollback_firmware` — Destructive — https://policylayer.com/tools/kiln/rollback-firmware.md
- `untrust_printer` — Destructive — https://policylayer.com/tools/kiln/untrust-printer.md
- `acquire_printer_lock` — Execute — https://policylayer.com/tools/kiln/acquire-printer-lock.md
- `arrange_parts_on_plate` — Execute — https://policylayer.com/tools/kiln/arrange-parts-on-plate.md
- `auto_arrange_parts_on_plate` — Execute — https://policylayer.com/tools/kiln/auto-arrange-parts-on-plate.md
- `auto_orient_model` — Execute — https://policylayer.com/tools/kiln/auto-orient-model.md
- `await_print_completion` — Execute — https://policylayer.com/tools/kiln/await-print-completion.md
- `boolean_mesh_op` — Execute — https://policylayer.com/tools/kiln/boolean-mesh-op.md
- `calibrate_direct` — Execute — https://policylayer.com/tools/kiln/calibrate-direct.md
- `clear_emergency_stop` — Execute — https://policylayer.com/tools/kiln/clear-emergency-stop.md
- `compile_scad` — Execute — https://policylayer.com/tools/kiln/compile-scad.md
- `complete_print_recovery` — Execute — https://policylayer.com/tools/kiln/complete-print-recovery.md
- `confirm_print_recovery` — Execute — https://policylayer.com/tools/kiln/confirm-print-recovery.md
- `design_to_gcode_pipeline` — Execute — https://policylayer.com/tools/kiln/design-to-gcode-pipeline.md
- `emergency_stop` — Execute — https://policylayer.com/tools/kiln/emergency-stop.md
- `emergency_trip_input` — Execute — https://policylayer.com/tools/kiln/emergency-trip-input.md
- `firmware_resume_print` — Execute — https://policylayer.com/tools/kiln/firmware-resume-print.md
- `force_print_oversize` — Execute — https://policylayer.com/tools/kiln/force-print-oversize.md
- …and 371 more: https://policylayer.com/tools/kiln.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=kiln · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/kiln