vfx_lum_contrast · vidMagik- MCP: Risk & Policy

WHAT IT DOES

What vfx_lum_contrast does on vidMagik-mcp

AI agents use vfx_lum_contrast 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_lum_contrast needs a policy

This tool applies a luminosity/contrast effect to video, which creates or modifies visual data in a reversible manner. It does not execute arbitrary code, delete data, or trigger external operations. The modification is temporary and can be undone or re-rendered differently, classifying it as Write rather than Execute.

From the tool's definition vfx_lum_contrast: applies luminosity contrast adjustment, a non-destructive video effect that modifies pixel values. The tool name prefix 'vfx_' indicates video effects processing.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vfx_lum_contrast Rate-limited

vfx_lum_contrast 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_lum_contrast": {
      "limits": [
        {
          "counter": "vfx_lum_contrast_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_lum_contrast

What does the vfx_lum_contrast tool do? +

Luminosity contrast. 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_lum_contrast? +

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

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

Can I rate-limit vfx_lum_contrast? +

Yes. Add a rate_limit block to the vfx_lum_contrast 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_lum_contrast completely? +

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

vfx_lum_contrast 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.