vast_create_linear_media · AdButler MCP: Risk & Policy

WHAT IT DOES

What vast_create_linear_media does on AdButler

AI agents use vast_create_linear_media 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
`name`	string	Yes	Linear media name
`bitrate`	number	—	Bitrate in kbps
`duration`	number	—	Duration in seconds
`mime_type`	string	—	MIME type (e.g. video/mp4)

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why vast_create_linear_media needs a policy

This tool creates a new media asset in the AdButler ad serving system. Creation is reversible (via archival or deletion by other sibling tools shown), and the action modifies campaign/ad inventory without executing code or deleting data.

From the tool's definition The tool 'vast_create_linear_media' with description 'Create a new VAST linear media' explicitly uses the verb 'Create', indicating data creation in the advertising platform (VAST = Video Ad Serving Template).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vast_create_linear_media Rate-limited

vast_create_linear_media 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": {
    "vast_create_linear_media": {
      "limits": [
        {
          "counter": "vast_create_linear_media_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 vast_create_linear_media

What does the vast_create_linear_media tool do? +

Create a new VAST linear media. 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 vast_create_linear_media accept? +

vast_create_linear_media accepts 4 parameters: name, bitrate, duration, mime_type. Required: name. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on vast_create_linear_media? +

Register the AdButler MCP server in PolicyLayer and add a rule for vast_create_linear_media: 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 vast_create_linear_media? +

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

Can I rate-limit vast_create_linear_media? +

Yes. Add a rate_limit block to the vast_create_linear_media 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 vast_create_linear_media completely? +

Set action: deny in the PolicyLayer policy for vast_create_linear_media. 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 vast_create_linear_media? +

vast_create_linear_media 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.