ae_create_composition

Create a new composition in After Effects with specified dimensions, duration, and frame rate

SERVERAe SOURCEae-mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/ae/ae-create-composition.md

WHAT IT DOES

What ae_create_composition does on Ae

AI agents use ae_create_composition to create or update resources in Ae, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ae environment.

RISK

Why ae_create_composition is rated Medium

This tool creates a new composition (a reversible data structure in After Effects) with specified parameters. It modifies the project by adding new content but does not execute arbitrary code, delete data, or move money. The reversible nature of creation (can be undone/deleted) places it in Write rather than Execute or Destructive.

From the tool's definition Tool description states 'Create a new composition' which is a create action that modifies project state by adding a new artifact.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs ae_create_composition safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Ae, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For ae_create_composition, this is the rule to start with:

ae_create_composition Rate-limited

ae_create_composition 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": {
    "ae_create_composition": {
      "limits": [
        {
          "counter": "ae_create_composition_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Ae, apply this rule, and every ae_create_composition call is checked against it from then on.

FAQ

Questions about ae_create_composition

What does the ae_create_composition tool do? +

Create a new composition in After Effects with specified dimensions, duration, and frame rate. It is categorised as a Write tool in the Ae MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on ae_create_composition? +

Register the Ae MCP server in PolicyLayer and add a rule for ae_create_composition: 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 Ae. Nothing to install.

What risk level is ae_create_composition? +

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

Can I rate-limit ae_create_composition? +

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

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

ae_create_composition is provided by the Ae MCP server (ae-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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