# vast42_create_mezzanine

Create a VAST 4.2 mezzanine

Agent View of the PolicyLayer registry record for `vast42_create_mezzanine`. HTML page: https://policylayer.com/tools/adbutler/vast42-create-mezzanine

## Facts

- Tool: `vast42_create_mezzanine`
- 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: 2
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `name` | string | no | Mezzanine name |
| `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_mezzanine",
    "arguments": {}
  }
}
```

## Why vast42_create_mezzanine is rated Medium

This tool creates a VAST 4.2 mezzanine file/resource, which is a write operation that modifies the ad serving configuration. It is reversible (can be archived or deleted later) and does not execute arbitrary code or permanently destroy data. The blast radius is moderate—a misused mezzanine could disrupt ad campaigns or create invalid ad configurations, but the core operation is reversible.

From the tool's own definition: "Tool name contains 'create' and description states 'Create a VAST 4.2 mezzanine', indicating a data creation operation. VAST (Video Ad Serving Template) mezzanine creation is a reversible write operation that generates ad-serving configuration/metadata."

## Use case

AI agents use vast42_create_mezzanine 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_mezzanine": {
      "limits": [
        {
          "counter": "vast42_create_mezzanine_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`

---

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