setLayerKeyframe · After Effects MCP Server MCP

WHAT IT DOES

What setLayerKeyframe does on After Effects MCP Server

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

WHY IT NEEDS A POLICY

Why setLayerKeyframe needs a policy

The name implies creating or modifying animation keyframe data on a layer, which is a reversible write operation. However, the empty description lowers confidence significantly. Based on the server context (After Effects layer management and animation), this most likely writes keyframe data rather than deleting or executing code.

From the tool's definition Tool name 'setLayerKeyframe' suggests setting/creating a keyframe on a layer in After Effects; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

setLayerKeyframe Rate-limited

setLayerKeyframe 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": {
    "setLayerKeyframe": {
      "limits": [
        {
          "counter": "setlayerkeyframe_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 After Effects MCP Server, so you can run agents against it safely.

FAQ

Questions about setLayerKeyframe

What does the setLayerKeyframe tool do? +

setLayerKeyframe. It is categorised as a Write tool in the After Effects MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on setLayerKeyframe? +

Register the After Effects MCP Server MCP server in PolicyLayer and add a rule for setLayerKeyframe: 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 After Effects MCP Server. Nothing to install.

What risk level is setLayerKeyframe? +

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

Can I rate-limit setLayerKeyframe? +

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

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

setLayerKeyframe is provided by the After Effects MCP Server MCP server (rtx1025189518-source/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.