# update_music_track

Tweak a music track. fields keys: name, volume (0-1), loop, start_frame, duration_frames, position, trim_start_frame, trim_end_frame.

Agent View of the PolicyLayer registry record for `update_music_track`. HTML page: https://policylayer.com/tools/com-framesail-framesail/update-music-track

## Facts

- Tool: `update_music_track`
- Server: Framesail (`https://api.framesail.com/mcp`) — https://policylayer.com/tools/com-framesail-framesail.md
- Homepage: https://github.com/https://api.framesail.com/mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 2 (2 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `fields` | object | yes | Partial dict of track fields to patch; allowed keys: name, volume (0-1), loop, start_frame, duration_frames, position, trim_start_frame, trim_end_frame |
| `track_id` | string | yes | Music track ID, from list_music_tracks or add_music_track |

Parameters from the server's own tool schema.

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

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "update_music_track",
    "arguments": {
      "fields": {},
      "track_id": "<track_id>"
    }
  }
}
```

## Why update_music_track is rated Medium

The tool creates or modifies data (music track properties) reversibly. It adjusts parameters of an existing track rather than permanently deleting it or executing arbitrary code. The changes can be undone by updating the fields again. Severity is medium because misuse could corrupt a video project's audio composition, requiring rework, but the damage is repairable and contained to the video editing context.

From the tool's own definition: "Tool description states 'Tweak a music track' with modifiable fields including name, volume, loop, start_frame, duration_frames, position, trim_start_frame, and trim_end_frame. These are reversible modifications to existing media assets."

## Use case

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

## Recommended policy (PolicyLayer)

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

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

## Other tools on Framesail (67)

- `delete_asset` — Destructive — https://policylayer.com/tools/com-framesail-framesail/delete-asset.md
- `delete_project` — Destructive — https://policylayer.com/tools/com-framesail-framesail/delete-project.md
- `delete_style` — Destructive — https://policylayer.com/tools/com-framesail-framesail/delete-style.md
- `director_note` — Destructive — https://policylayer.com/tools/com-framesail-framesail/director-note.md
- `remove_music_track` — Destructive — https://policylayer.com/tools/com-framesail-framesail/remove-music-track.md
- `scan_script` — Destructive — https://policylayer.com/tools/com-framesail-framesail/scan-script.md
- `analyze_style` — Execute — https://policylayer.com/tools/com-framesail-framesail/analyze-style.md
- `build_scenes` — Execute — https://policylayer.com/tools/com-framesail-framesail/build-scenes.md
- `export_video` — Execute — https://policylayer.com/tools/com-framesail-framesail/export-video.md
- `regenerate_segment_asset` — Execute — https://policylayer.com/tools/com-framesail-framesail/regenerate-segment-asset.md
- `await_jobs` — Read — https://policylayer.com/tools/com-framesail-framesail/await-jobs.md
- `browse_audio_library` — Read — https://policylayer.com/tools/com-framesail-framesail/browse-audio-library.md
- `get_credit_balance` — Read — https://policylayer.com/tools/com-framesail-framesail/get-credit-balance.md
- `get_pipeline_progress` — Read — https://policylayer.com/tools/com-framesail-framesail/get-pipeline-progress.md
- `get_project` — Read — https://policylayer.com/tools/com-framesail-framesail/get-project.md
- `get_script` — Read — https://policylayer.com/tools/com-framesail-framesail/get-script.md
- `get_section_template` — Read — https://policylayer.com/tools/com-framesail-framesail/get-section-template.md
- `get_segment_assets` — Read — https://policylayer.com/tools/com-framesail-framesail/get-segment-assets.md
- `get_segments` — Read — https://policylayer.com/tools/com-framesail-framesail/get-segments.md
- `get_style` — Read — https://policylayer.com/tools/com-framesail-framesail/get-style.md
- `get_video_url` — Read — https://policylayer.com/tools/com-framesail-framesail/get-video-url.md
- `get_workflow_status` — Read — https://policylayer.com/tools/com-framesail-framesail/get-workflow-status.md
- `list_assets` — Read — https://policylayer.com/tools/com-framesail-framesail/list-assets.md
- `list_channels` — Read — https://policylayer.com/tools/com-framesail-framesail/list-channels.md
- `list_models` — Read — https://policylayer.com/tools/com-framesail-framesail/list-models.md
- `list_music_tracks` — Read — https://policylayer.com/tools/com-framesail-framesail/list-music-tracks.md
- `list_projects` — Read — https://policylayer.com/tools/com-framesail-framesail/list-projects.md
- `list_provider_keys` — Read — https://policylayer.com/tools/com-framesail-framesail/list-provider-keys.md
- `list_scenes` — Read — https://policylayer.com/tools/com-framesail-framesail/list-scenes.md
- `list_style_presets` — Read — https://policylayer.com/tools/com-framesail-framesail/list-style-presets.md
- …and 37 more: https://policylayer.com/tools/com-framesail-framesail.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`

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