add_markers · Media-Editor- MCP: Risk & Policy

WHAT IT DOES

What add_markers does on Media-Editor-MCP

AI agents use add_markers 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 add_markers needs a policy

This tool creates new markers in a video editing project, which is a reversible write operation. It modifies the active sequence by adding metadata without deleting or executing external code. The severity is medium because misuse could create many unwanted markers that clutter a project, but they are easily removable and don't cause permanent data loss or financial impact.

From the tool's definition Tool name 'add_markers' and description 'Add markers to the active sequence' indicate creation/modification of video editing metadata. Markers are annotations added to video sequences that modify the editing project state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_markers Rate-limited

add_markers 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": {
    "add_markers": {
      "limits": [
        {
          "counter": "add_markers_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 add_markers

What does the add_markers tool do? +

Add markers to the active sequence. 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 add_markers? +

Register the Media-Editor- MCP server in PolicyLayer and add a rule for add_markers: 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 add_markers? +

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

Can I rate-limit add_markers? +

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

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

add_markers 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.