start_video_generation · Veo 3 1 MCP Server MCP

WHAT IT DOES

What start_video_generation does on Veo 3 1 MCP Server

AI agents invoke start_video_generation to trigger actions in Veo 3 1 MCP Server. 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 start_video_generation needs a policy

This tool triggers external video generation operations whose effects depend on user-supplied arguments (prompt text, reference images, interpolation parameters). While it does not execute arbitrary code or shell commands on the local system, it executes a remote generative AI service, which is a form of external operation triggering.

From the tool's definition Tool 'start_video_generation' initiates a video generation job using Google's Veo 3.1 model. The description states it 'Start[s] a Veo 3.1 video generation job' and 'Supports text-to-video, reference images (up to 3), and first/last frame interpolation.' This…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

start_video_generation Rate-limited

start_video_generation 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": {
    "start_video_generation": {
      "limits": [
        {
          "counter": "start_video_generation_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 Veo 3 1 MCP Server, so you can run agents against it safely.

FAQ

Questions about start_video_generation

What does the start_video_generation tool do? +

Start a Veo 3.1 video generation job. This returns an operation ID immediately - use get_video_job to poll for completion. Supports text-to-video, reference images (up to 3), and first/last frame interpolation. It is categorised as a Execute tool in the Veo 3 1 MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on start_video_generation? +

Register the Veo 3 1 MCP Server MCP server in PolicyLayer and add a rule for start_video_generation: 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 Veo 3 1 MCP Server. Nothing to install.

What risk level is start_video_generation? +

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

Can I rate-limit start_video_generation? +

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

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

start_video_generation is provided by the Veo 3 1 MCP Server MCP server (waimakers/veo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.