extend_video

SERVERMCP Kling SOURCE199-mcp/mcp-kling

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/199-mcp-mcp-kling/extend-video.md

WHAT IT DOES

What extend_video does on MCP Kling

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

RISK

Why extend_video is rated Medium

This tool creates new video content by appending to an existing video. It is a creative/generative write operation that modifies/extends a video asset. It is reversible in the sense that the original video is not destroyed, making it Write rather than Destructive. The blast radius is medium as it consumes API credits and generates content, but does not delete data or move money directly.

From the tool's definition Extend a video by 4-5 seconds using Kling AI... generating new content that seamlessly follows from the last frame

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs extend_video safely

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

extend_video Rate-limited

extend_video 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": {
    "extend_video": {
      "limits": [
        {
          "counter": "extend_video_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 MCP Kling, apply this rule, and every extend_video call is checked against it from then on.

FAQ

Questions about extend_video

What does the extend_video tool do? +

Extend a video by 4-5 seconds using Kling AI. This feature allows you to continue a video beyond its original ending, generating new content that seamlessly follows from the last frame. Perfect for creating longer sequences or adding additional scenes to existing videos. It is categorised as a Write tool in the MCP Kling MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on extend_video? +

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

What risk level is extend_video? +

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

Can I rate-limit extend_video? +

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

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

extend_video is provided by the MCP Kling MCP server (199-mcp/mcp-kling). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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