vast42_update_mezzanine · AdButler MCP: Risk & Policy

WHAT IT DOES

What vast42_update_mezzanine does on AdButler

AI agents use vast42_update_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.

PARAMETERS

Parameter	Type	Required	Description
`id`	number	Yes	VAST 4.2 mezzanine ID
`name`	string	—	Mezzanine name
`mime_type`	string	—	MIME type

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why vast42_update_mezzanine needs a policy

This tool creates or modifies ad serving configuration data reversibly. It does not delete (Destructive), execute arbitrary code (Execute), involve financial transactions (Financial), or merely read data (Read). The blast radius is medium because misconfigured VAST mezzanines could affect ad delivery across campaigns, but changes are reversible.

From the tool's definition Tool name 'vast42_update_mezzanine' and description 'Update a VAST 4.2 mezzanine' indicate modification of existing advertising configuration data (VAST is Video Ad Serving Template format). The 'update' action modifies data reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vast42_update_mezzanine Rate-limited

vast42_update_mezzanine stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "vast42_update_mezzanine": {
      "limits": [
        {
          "counter": "vast42_update_mezzanine_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches AdButler, so you can run agents against it safely.

FAQ

Questions about vast42_update_mezzanine

What does the vast42_update_mezzanine tool do? +

Update a VAST 4.2 mezzanine. It is categorised as a Write tool in the AdButler MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does vast42_update_mezzanine accept? +

vast42_update_mezzanine accepts 3 parameters: id, name, mime_type. Required: id. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on vast42_update_mezzanine? +

Register the AdButler MCP server in PolicyLayer and add a rule for vast42_update_mezzanine: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches AdButler. Nothing to install.

What risk level is vast42_update_mezzanine? +

vast42_update_mezzanine is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit vast42_update_mezzanine? +

Yes. Add a rate_limit block to the vast42_update_mezzanine rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block vast42_update_mezzanine completely? +

Set action: deny in the PolicyLayer policy for vast42_update_mezzanine. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides vast42_update_mezzanine? +

vast42_update_mezzanine is provided by the AdButler MCP server (adbutler/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.