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.
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.
An AI agent can call extend_video faster than any human can review — one bad instruction and it creates or modifies resources in MCP Kling by the hundred, each call as confident as the last.
Documented attack patterns abuse exactly the kind of access extend_video gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Kling, and nothing reaches the server without passing your rules. This is the rule we recommend for extend_video:
{
"version": "1",
"default": "deny",
"tools": {
"extend_video": {
"limits": [
{
"counter": "extend_video_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}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.
Free to start. No card required.
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.
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.
extend_video is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
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.
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.
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.
Deterministic rules across all 12 MCP Kling tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
12 MCP Kling tools catalogued and risk-classified — across an index of 42,500+ MCP servers.