vast_create_channel · AdButler MCP: Risk & Policy

WHAT IT DOES

What vast_create_channel does on AdButler

AI agents use vast_create_channel 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	Channel name
`description`	string	—	Channel description

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why vast_create_channel needs a policy

This tool creates a new VAST channel, which is a reversible operation that modifies the advertising system's configuration. It does not delete data (would be Destructive), execute arbitrary commands (would be Execute), or move money (would be Financial). Creating a VAST channel is a Write operation because it adds new data/configuration to the system.

From the tool's definition Tool name 'vast_create_channel' and description 'Create a new VAST channel' indicate creation of a new configuration object within the AdButler ad management system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vast_create_channel Rate-limited

vast_create_channel 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_channel": {
      "limits": [
        {
          "counter": "vast_create_channel_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_channel

What does the vast_create_channel tool do? +

Create a new VAST channel. 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_channel accept? +

vast_create_channel accepts 2 parameters: name, description. 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_channel? +

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

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

Can I rate-limit vast_create_channel? +

Yes. Add a rate_limit block to the vast_create_channel 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_channel completely? +

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

vast_create_channel 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.