create_comp

Create a composition in the current or provided project and optionally save.

SERVERAe SOURCE@synthetic-ai/ae-mcp

Medium RISK CLASS

Category Write

Parameters 101 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/synthetic-ai-ae-mcp/create-comp.md

WHAT IT DOES

What create_comp does on Ae

AI agents use create_comp 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.

Parameter	Type	Required	Description
`name`	string	Yes	Composition name.
`save`	boolean	—	Save the project after creating the comp. Defaults to false.
`width`	number	—	Width in pixels. Defaults to 1920.
`height`	number	—	Height in pixels. Defaults to 1080.
`duration`	number	—	Duration in seconds. Defaults to 10.
`frameRate`	number	—	Frame rate. Defaults to 30.
`timeoutMs`	number	—	Process timeout in milliseconds. Defaults to 120000.
`pixelAspect`	number	—	Pixel aspect ratio. Defaults to 1.
`projectPath`	string	—	Optional absolute path to an .aep file to open first.
`backgroundColor`	array	—	Optional RGB array with 0..1 values.

Parameters from the server's own tool schema.

RISK

Why create_comp is rated Medium

An AI agent can call create_comp faster than any human can review: one bad instruction and it creates or modifies resources in Ae by the hundred, each call as confident as the last.

Risk signalsHigh parameter count (10 properties)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_comp 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 create_comp, this is the rule to start with:

create_comp Rate-limited

create_comp 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": {
    "create_comp": {
      "limits": [
        {
          "counter": "create_comp_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 create_comp call is checked against it from then on.

FAQ

Questions about create_comp

What does the create_comp tool do? +

Create a composition in the current or provided project and optionally save. 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.

What parameters does create_comp accept? +

create_comp accepts 10 parameters: name, save, width, height, duration, frameRate, timeoutMs, pixelAspect, projectPath, backgroundColor. Required: name. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on create_comp? +

Register the Ae MCP server in PolicyLayer and add a rule for create_comp: 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 create_comp? +

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

Can I rate-limit create_comp? +

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

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

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

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