run-script

Run a read-only script in After Effects

SERVERAos SOURCE@hybridlabor-api/aos

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/hybridlabor-api-aos/run-script.md

WHAT IT DOES

What run-script does on Aos

AI agents invoke run-script to trigger actions in Aos. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why run-script is rated High

This tool falls into the Execute category because it runs code (ExtendScript) within After Effects. The 'read-only' designation limits the scope to non-destructive operations, but script execution remains a powerful capability that could trigger side effects depending on the script content (rendering operations, layer manipulations, API calls, etc.).

From the tool's definition The tool explicitly provides capability to 'Run a read-only script in After Effects'. Despite the 'read-only' qualifier, this is a code execution facility that invokes ExtendScript within After Effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs run-script safely

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

run-script Rate-limited

run-script stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "run-script": {
      "limits": [
        {
          "counter": "run-script_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about run-script

What does the run-script tool do? +

Run a read-only script in After Effects. It is categorised as a Execute tool in the Aos MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on run-script? +

Register the Aos MCP server in PolicyLayer and add a rule for run-script: 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 Aos. Nothing to install.

What risk level is run-script? +

run-script is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit run-script? +

Yes. Add a rate_limit block to the run-script 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 run-script completely? +

Set action: deny in the PolicyLayer policy for run-script. 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 run-script? +

run-script is provided by the Aos MCP server (@hybridlabor-api/aos). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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