# fl_set_mixer_volume

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

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

## Facts

- Tool: `fl_set_mixer_volume`
- 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_mixer_volume",
    "arguments": {}
  }
}
```

## Why fl_set_mixer_volume is rated Medium

This tool creates or modifies mixer volume settings in FL Studio, which is a reversible change typical of Write category operations. While it affects audio output, the modification is not destructive (can be undone/adjusted) and does not execute arbitrary code or delete data. Severity is medium because an AI agent could degrade audio quality or disrupt the mixing process, but the effect is correctable.

From the tool's own definition: "Tool name 'fl_set_mixer_volume' indicates it modifies mixer volume parameters in FL Studio. The description is empty, but the name and context (FL Studio DAW control via MCP server) clearly indicate a state-modifying operation."

## Use case

AI agents use fl_set_mixer_volume 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_mixer_volume": {
      "limits": [
        {
          "counter": "fl_set_mixer_volume_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