vfx_resize · vidMagik- MCP: Risk & Policy

WHAT IT DOES

What vfx_resize does on vidMagik-mcp

AI agents use vfx_resize to create or update resources in vidMagik-mcp — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your vidMagik-mcp environment.

WHY IT NEEDS A POLICY

Why vfx_resize needs a policy

Resizing a video clip modifies its properties (width, height, or aspect ratio) but does not delete data or execute arbitrary code. The operation is reversible, placing it in the Write category rather than Execute or Destructive. Severity is medium because a misused resize could distort content or impact downstream processing, but the effect is not irreversible and does not involve code execution or data destruction.

From the tool's definition Tool name 'vfx_resize' and description 'Resize clip' indicate modification of video clip dimensions. This is a write operation that transforms video data reversibly—resizing can be undone by resizing again to original dimensions.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vfx_resize Rate-limited

vfx_resize 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": {
    "vfx_resize": {
      "limits": [
        {
          "counter": "vfx_resize_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 vidMagik-mcp, so you can run agents against it safely.

FAQ

Questions about vfx_resize

What does the vfx_resize tool do? +

Resize clip. It is categorised as a Write tool in the vidMagik-mcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on vfx_resize? +

Register the vidMagik- MCP server in PolicyLayer and add a rule for vfx_resize: 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 vidMagik-mcp. Nothing to install.

What risk level is vfx_resize? +

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

Can I rate-limit vfx_resize? +

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

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

vfx_resize is provided by the vidMagik- MCP server (vizionik25/vidmagik-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.