apply_transition · Media-Editor- MCP: Risk & Policy

WHAT IT DOES

What apply_transition does on Media-Editor-MCP

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

WHY IT NEEDS A POLICY

Why apply_transition needs a policy

This tool creates or modifies video project data (transition metadata) in a reversible manner. It does not execute arbitrary code, delete content, or cause financial impact. The medium severity reflects that misuse could corrupt or degrade video edit quality, but changes can be undone through standard undo operations in video editing software.

From the tool's definition Tool modifies video editing state by setting transition properties that follow a clip, which changes the project structure reversibly. The description 'Set the transition that follows a clip' indicates a state modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

apply_transition Rate-limited

apply_transition 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": {
    "apply_transition": {
      "limits": [
        {
          "counter": "apply_transition_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 Media-Editor-MCP, so you can run agents against it safely.

FAQ

Questions about apply_transition

What does the apply_transition tool do? +

Set the transition that follows a clip (into the next one). It is categorised as a Write tool in the Media-Editor-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 apply_transition? +

Register the Media-Editor- MCP server in PolicyLayer and add a rule for apply_transition: 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 Media-Editor-MCP. Nothing to install.

What risk level is apply_transition? +

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

Can I rate-limit apply_transition? +

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

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

apply_transition is provided by the Media-Editor- MCP server (nguyenph88/media-editor-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.