vast_update_campaign_assignment

WHAT IT DOES

What vast_update_campaign_assignment does on AdButler

AI agents use vast_update_campaign_assignment 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 campaign assignment ID
`active`	boolean	—	Whether to actively serve ads
`ad_item`	number	—	VAST ad item ID
`campaign`	number	—	VAST campaign ID

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why vast_update_campaign_assignment needs a policy

The tool modifies campaign assignments within an advertising management system. This is a reversible write operation that changes configuration but does not delete data or execute arbitrary code. The blast radius is medium because incorrect updates could affect ad delivery and campaign targeting, but changes can typically be rolled back.

From the tool's definition Tool name contains 'update' and description states 'Update a VAST campaign assignment', indicating modification of existing campaign configuration data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vast_update_campaign_assignment Rate-limited

vast_update_campaign_assignment 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_update_campaign_assignment": {
      "limits": [
        {
          "counter": "vast_update_campaign_assignment_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_update_campaign_assignment

What does the vast_update_campaign_assignment tool do? +

Update a VAST campaign assignment. 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_update_campaign_assignment accept? +

vast_update_campaign_assignment accepts 4 parameters: id, active, ad_item, campaign. Required: id. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on vast_update_campaign_assignment? +

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

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

Can I rate-limit vast_update_campaign_assignment? +

Yes. Add a rate_limit block to the vast_update_campaign_assignment 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_update_campaign_assignment completely? +

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

vast_update_campaign_assignment 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.