vfx_even_size · vidMagik- MCP: Risk & Policy

WHAT IT DOES

What vfx_even_size does on vidMagik-mcp

AI agents use vfx_even_size 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_even_size needs a policy

The tool modifies video dimensions to even numbers, which is a common preprocessing step in video editing. This falls under Write (creates or modifies data reversibly) rather than Read (no modification) or Execute (no arbitrary code execution). Severity is medium because dimension changes could affect downstream processing or output quality, but the operation is reversible and non-destructive.

From the tool's definition Tool name 'vfx_even_size' and description 'Make dimensions even' indicate modification of video/image dimensions. This is a reversible transformation that alters video metadata/properties but does not delete or execute arbitrary code.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vfx_even_size Rate-limited

vfx_even_size 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_even_size": {
      "limits": [
        {
          "counter": "vfx_even_size_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_even_size

What does the vfx_even_size tool do? +

Make dimensions even. 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_even_size? +

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

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

Can I rate-limit vfx_even_size? +

Yes. Add a rate_limit block to the vfx_even_size 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_even_size completely? +

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

vfx_even_size 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.