vfx_loop · vidMagik- MCP: Risk & Policy

WHAT IT DOES

What vfx_loop does on vidMagik-mcp

AI agents use vfx_loop 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_loop needs a policy

Looping a video clip creates new/modified media data (Write category), but the modification is reversible—the original clip remains unchanged and the operation can be undone or replaced. This is less severe than Destructive (which irreversibly deletes data) or Execute (which runs arbitrary code).

From the tool's definition Tool name 'vfx_loop' and description 'Loop clip' indicates it modifies video clip data by repeating/extending clip duration. The 'vfx_' prefix and context among video/audio effect tools confirms this creates a modified version of video content.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vfx_loop Rate-limited

vfx_loop 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_loop": {
      "limits": [
        {
          "counter": "vfx_loop_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_loop

What does the vfx_loop tool do? +

Loop 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_loop? +

Register the vidMagik- MCP server in PolicyLayer and add a rule for vfx_loop: 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_loop? +

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

Can I rate-limit vfx_loop? +

Yes. Add a rate_limit block to the vfx_loop 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_loop completely? +

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

vfx_loop 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.