# libi.register_mcp_server

Register a new external MCP server so it becomes available in future agent sessions. Use this when the user asks you to add an MCP tool. Install any required npm packages first (e.g., via npx), then call this tool to wire up the server config. The server will be available after the next session starts. Ask the user whether the server should require approval before use.

Agent View of the PolicyLayer registry record for `libi.register_mcp_server`. HTML page: https://policylayer.com/tools/libi/libi.register-mcp-server

## Facts

- Tool: `libi.register_mcp_server`
- Server: Libi (`Nagellabs/libi`) — https://policylayer.com/tools/libi.md
- Homepage: https://github.com/Nagellabs/libi
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

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

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

## Why libi.register_mcp_server is rated Medium

Creates persistent MCP server configuration enabling new tool access; reversible but grants significant capability expansion.

From the tool's own definition: "Register a new external MCP server, wire up the server config, becomes available in future agent sessions."

## Use case

AI agents use libi.register_mcp_server to create or update resources in Libi, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Libi environment.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "libi.register_mcp_server": {
      "limits": [
        {
          "counter": "libi.register_mcp_server_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Libi (214)

- `libi.analysis_remove_step` — Destructive — https://policylayer.com/tools/libi/libi.analysis-remove-step.md
- `libi.audio_remove_clip` — Destructive — https://policylayer.com/tools/libi/libi.audio-remove-clip.md
- `libi.clear_layer_effect` — Destructive — https://policylayer.com/tools/libi/libi.clear-layer-effect.md
- `libi.delete_asset_folder` — Destructive — https://policylayer.com/tools/libi/libi.delete-asset-folder.md
- `libi.delete_caption_style` — Destructive — https://policylayer.com/tools/libi/libi.delete-caption-style.md
- `libi.delete_character` — Destructive — https://policylayer.com/tools/libi/libi.delete-character.md
- `libi.delete_clip` — Destructive — https://policylayer.com/tools/libi/libi.delete-clip.md
- `libi.delete_file` — Destructive — https://policylayer.com/tools/libi/libi.delete-file.md
- `libi.delete_folder` — Destructive — https://policylayer.com/tools/libi/libi.delete-folder.md
- `libi.delete_item` — Destructive — https://policylayer.com/tools/libi/libi.delete-item.md
- `libi.delete_keyframe` — Destructive — https://policylayer.com/tools/libi/libi.delete-keyframe.md
- `libi.delete_overlay_preset` — Destructive — https://policylayer.com/tools/libi/libi.delete-overlay-preset.md
- `libi.delete_piece` — Destructive — https://policylayer.com/tools/libi/libi.delete-piece.md
- `libi.delete_scene` — Destructive — https://policylayer.com/tools/libi/libi.delete-scene.md
- `libi.delete_track` — Destructive — https://policylayer.com/tools/libi/libi.delete-track.md
- `libi.discard_draft` — Destructive — https://policylayer.com/tools/libi/libi.discard-draft.md
- `libi.drop_proxies` — Destructive — https://policylayer.com/tools/libi/libi.drop-proxies.md
- `libi.invalidate_model_schema_cache` — Destructive — https://policylayer.com/tools/libi/libi.invalidate-model-schema-cache.md
- `libi.remove_effect` — Destructive — https://policylayer.com/tools/libi/libi.remove-effect.md
- `libi.remove_mcp_server` — Destructive — https://policylayer.com/tools/libi/libi.remove-mcp-server.md
- `libi.remove_overlay` — Destructive — https://policylayer.com/tools/libi/libi.remove-overlay.md
- `libi.remove_skill` — Destructive — https://policylayer.com/tools/libi/libi.remove-skill.md
- `libi.remove_skill_prompt` — Destructive — https://policylayer.com/tools/libi/libi.remove-skill-prompt.md
- `libi.restore_snapshot` — Destructive — https://policylayer.com/tools/libi/libi.restore-snapshot.md
- `compose_music` — Execute — https://policylayer.com/tools/libi/compose-music.md
- `isolate_audio` — Execute — https://policylayer.com/tools/libi/isolate-audio.md
- `libi.analysis_extract_audio` — Execute — https://policylayer.com/tools/libi/libi.analysis-extract-audio.md
- `libi.analysis_transcribe_audio` — Execute — https://policylayer.com/tools/libi/libi.analysis-transcribe-audio.md
- `libi.cancel_job` — Execute — https://policylayer.com/tools/libi/libi.cancel-job.md
- `libi.compute_object_track` — Execute — https://policylayer.com/tools/libi/libi.compute-object-track.md
- …and 184 more: https://policylayer.com/tools/libi.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=libi · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/libi