wait_for_job · Mcp Media Engine MCP: Risk & Policy

WHAT IT DOES

What wait_for_job does on Mcp Media Engine

AI agents invoke wait_for_job to trigger actions in Mcp Media Engine. 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.

WHY IT NEEDS A POLICY

Why wait_for_job needs a policy

This tool waits for completion of media generation jobs submitted by sibling tools like generate_image, generate_video, and generate_audio. While the polling itself is passive monitoring, it is fundamentally part of executing an external operation whose effects (media asset creation) depend on the job context.

From the tool's definition Tool performs polling of an external job (media generation) that "completes" with side effects—the generated media becomes available as a result of the underlying job execution.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

wait_for_job Rate-limited

wait_for_job 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": {
    "wait_for_job": {
      "limits": [
        {
          "counter": "wait_for_job_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mcp Media Engine, so you can run agents against it safely.

FAQ

Questions about wait_for_job

What does the wait_for_job tool do? +

Wait for a media generation job to complete — polls until the image, video, or audio is ready or the timeout is reached. It is categorised as a Execute tool in the Mcp Media Engine MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on wait_for_job? +

Register the Mcp Media Engine MCP server in PolicyLayer and add a rule for wait_for_job: 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 Mcp Media Engine. Nothing to install.

What risk level is wait_for_job? +

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

Can I rate-limit wait_for_job? +

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

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

wait_for_job is provided by the Mcp Media Engine MCP server (tr1ckymag1ca1/mcp-media-engine). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.