# fl_set_pattern_length

A write tool on the FL Studio MCP Server MCP server.

Agent View of the PolicyLayer registry record for `fl_set_pattern_length`. HTML page: https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-set-pattern-length

## Facts

- Tool: `fl_set_pattern_length`
- Server: FL Studio MCP Server (`404kidwiz/fl-studio-mcp`) — https://policylayer.com/tools/404kidwiz-fl-studio-mcp.md
- Homepage: https://github.com/404kidwiz/fl-studio-mcp
- 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": "fl_set_pattern_length",
    "arguments": {}
  }
}
```

## Why fl_set_pattern_length is rated Medium

This tool modifies FL Studio pattern configuration, which is reversible (the pattern length can be changed again). It does not execute arbitrary code, delete data irreversibly, or involve financial transactions. While the empty description lowers confidence slightly, the naming convention and DAW context clearly indicate a Write category operation.

From the tool's own definition: "Tool name 'fl_set_pattern_length' indicates modification of a pattern's length property in FL Studio. The 'set_' prefix signifies a write operation that changes DAW state."

## Use case

AI agents use fl_set_pattern_length to create or update resources in FL Studio MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your FL Studio MCP Server environment.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "fl_set_pattern_length": {
      "limits": [
        {
          "counter": "fl_set_pattern_length_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on FL Studio MCP Server (109)

- `fl_clear_pattern` — Destructive — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-clear-pattern.md
- `fl_delete_marker` — Destructive — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-delete-marker.md
- `fl_undo` — Destructive — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-undo.md
- `fl_auto_mix` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-auto-mix.md
- `fl_browser_nav` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-browser-nav.md
- `fl_click_at` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-click-at.md
- `fl_dismiss_popup` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-dismiss-popup.md
- `fl_load_plugin` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-load-plugin.md
- `fl_load_vst_preset` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-load-vst-preset.md
- `fl_master_bus_clipper_optimizer` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-master-bus-clipper-optimizer.md
- `fl_multiband_stereo_widener_matrix` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-multiband-stereo-widener-matrix.md
- `fl_orchestral_articulation_mapper` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-orchestral-articulation-mapper.md
- `fl_panic` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-panic.md
- `fl_play_transport` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-play-transport.md
- `fl_polyphonic_midi_to_audio_harmonizer` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-polyphonic-midi-to-audio-harmonizer.md
- `fl_render_project` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-render-project.md
- `fl_resampler_glitch_generator` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-resampler-glitch-generator.md
- `fl_reset_ui` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-reset-ui.md
- `fl_set_plugin_param` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-set-plugin-param.md
- `fl_song_structure_mutator` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-song-structure-mutator.md
- `fl_spectral_morphing_engine` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-spectral-morphing-engine.md
- `fl_stop_transport` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-stop-transport.md
- `fl_ui_navigate` — Execute — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-ui-navigate.md
- `fl_ai_track_sheet_generator` — Read — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-ai-track-sheet-generator.md
- `fl_catalog_vst_preset` — Read — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-catalog-vst-preset.md
- `fl_get_channel_count` — Read — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-get-channel-count.md
- `fl_get_context` — Read — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-get-context.md
- `fl_get_current_pattern` — Read — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-get-current-pattern.md
- `fl_get_marker` — Read — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-get-marker.md
- `fl_get_mixer_state` — Read — https://policylayer.com/tools/404kidwiz-fl-studio-mcp/fl-get-mixer-state.md
- …and 79 more: https://policylayer.com/tools/404kidwiz-fl-studio-mcp.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=404kidwiz-fl-studio-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/404kidwiz-fl-studio-mcp