# vast42_create_media_file

Create a VAST 4.2 media file

Agent View of the PolicyLayer registry record for `vast42_create_media_file`. HTML page: https://policylayer.com/tools/adbutler/vast42-create-media-file

## Facts

- Tool: `vast42_create_media_file`
- Server: AdButler (`adbutler/mcp-server`) — https://policylayer.com/tools/adbutler.md
- Homepage: https://github.com/adbutler/mcp-server
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 5
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `name` | string | no | Media file name |
| `width` | number | no | Width in pixels |
| `height` | number | no | Height in pixels |
| `bitrate` | number | no | Bitrate in kbps |
| `mime_type` | string | no | MIME type |

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": "vast42_create_media_file",
    "arguments": {}
  }
}
```

## Why vast42_create_media_file is rated Medium

This tool creates new data (a VAST media file) that can be used in advertising campaigns. While creation is reversible (files can be deleted or replaced), it modifies the advertising system's state by adding new media assets.

From the tool's own definition: "Tool name 'vast42_create_media_file' and description 'Create a VAST 4.2 media file' indicate creation of new media/advertising content. VAST 4.2 is a standard for video ad serving."

## Use case

AI agents use vast42_create_media_file to create or update resources in AdButler, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your AdButler environment.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "vast42_create_media_file": {
      "limits": [
        {
          "counter": "vast42_create_media_file_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on AdButler (621)

- `archive_advertiser` — Destructive — https://policylayer.com/tools/adbutler/archive-advertiser.md
- `archive_channel` — Destructive — https://policylayer.com/tools/adbutler/archive-channel.md
- `archive_contract` — Destructive — https://policylayer.com/tools/adbutler/archive-contract.md
- `archive_email_zone` — Destructive — https://policylayer.com/tools/adbutler/archive-email-zone.md
- `archive_publisher` — Destructive — https://policylayer.com/tools/adbutler/archive-publisher.md
- `bulk_upload_remove_data_list` — Destructive — https://policylayer.com/tools/adbutler/bulk-upload-remove-data-list.md
- `bulk_upload_replace_user_db` — Destructive — https://policylayer.com/tools/adbutler/bulk-upload-replace-user-db.md
- `campaign_bulk_delete_catalog_ad_items` — Destructive — https://policylayer.com/tools/adbutler/campaign-bulk-delete-catalog-ad-items.md
- `cancel_signature_request` — Destructive — https://policylayer.com/tools/adbutler/cancel-signature-request.md
- `delete_advertiser` — Destructive — https://policylayer.com/tools/adbutler/delete-advertiser.md
- `delete_archived_campaign` — Destructive — https://policylayer.com/tools/adbutler/delete-archived-campaign.md
- `delete_archived_channel` — Destructive — https://policylayer.com/tools/adbutler/delete-archived-channel.md
- `delete_archived_contract` — Destructive — https://policylayer.com/tools/adbutler/delete-archived-contract.md
- `delete_audience` — Destructive — https://policylayer.com/tools/adbutler/delete-audience.md
- `delete_audio_creative` — Destructive — https://policylayer.com/tools/adbutler/delete-audio-creative.md
- `delete_beacon_signing_key` — Destructive — https://policylayer.com/tools/adbutler/delete-beacon-signing-key.md
- `delete_bidder` — Destructive — https://policylayer.com/tools/adbutler/delete-bidder.md
- `delete_campaign` — Destructive — https://policylayer.com/tools/adbutler/delete-campaign.md
- `delete_campaign_assignment` — Destructive — https://policylayer.com/tools/adbutler/delete-campaign-assignment.md
- `delete_catalog_ad_item` — Destructive — https://policylayer.com/tools/adbutler/delete-catalog-ad-item.md
- `delete_catalog_zone` — Destructive — https://policylayer.com/tools/adbutler/delete-catalog-zone.md
- `delete_channel` — Destructive — https://policylayer.com/tools/adbutler/delete-channel.md
- `delete_channel_zone_assignment` — Destructive — https://policylayer.com/tools/adbutler/delete-channel-zone-assignment.md
- `delete_contact` — Destructive — https://policylayer.com/tools/adbutler/delete-contact.md
- `delete_contract` — Destructive — https://policylayer.com/tools/adbutler/delete-contract.md
- `delete_contract_document` — Destructive — https://policylayer.com/tools/adbutler/delete-contract-document.md
- `delete_contract_payment` — Destructive — https://policylayer.com/tools/adbutler/delete-contract-payment.md
- `delete_contract_template` — Destructive — https://policylayer.com/tools/adbutler/delete-contract-template.md
- `delete_creative` — Destructive — https://policylayer.com/tools/adbutler/delete-creative.md
- `delete_custom_html_ad_item` — Destructive — https://policylayer.com/tools/adbutler/delete-custom-html-ad-item.md
- …and 591 more: https://policylayer.com/tools/adbutler.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=adbutler · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/adbutler