vast42_update_icon_click_fallback_image

WHAT IT DOES

What vast42_update_icon_click_fallback_image does on AdButler

AI agents use vast42_update_icon_click_fallback_image 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 icon click fallback image ID
`name`	string	—	Icon click fallback image name
`width`	number	—	Width in pixels
`height`	number	—	Height in pixels

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why vast42_update_icon_click_fallback_image needs a policy

This tool creates or modifies ad campaign data reversibly. It updates a VAST icon fallback image, which is a configuration change to ad serving behavior. The modification is reversible (can be updated again), so it qualifies as Write rather than Destructive.

From the tool's definition Tool name contains 'update' and description states 'Update a VAST 4.2 icon click fallback image' — this modifies an existing advertising asset (the fallback image for icon clicks in VAST 4.2 ad specifications).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vast42_update_icon_click_fallback_image Rate-limited

vast42_update_icon_click_fallback_image 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_icon_click_fallback_image": {
      "limits": [
        {
          "counter": "vast42_update_icon_click_fallback_image_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_icon_click_fallback_image

What does the vast42_update_icon_click_fallback_image tool do? +

Update a VAST 4.2 icon click fallback image. 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_icon_click_fallback_image accept? +

vast42_update_icon_click_fallback_image accepts 4 parameters: id, name, width, height. 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_icon_click_fallback_image? +

Register the AdButler MCP server in PolicyLayer and add a rule for vast42_update_icon_click_fallback_image: 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_icon_click_fallback_image? +

vast42_update_icon_click_fallback_image is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit vast42_update_icon_click_fallback_image? +

Yes. Add a rate_limit block to the vast42_update_icon_click_fallback_image 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_icon_click_fallback_image completely? +

Set action: deny in the PolicyLayer policy for vast42_update_icon_click_fallback_image. 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_icon_click_fallback_image? +

vast42_update_icon_click_fallback_image 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.