libi.extract_audio
Extract the audio stream of a video file to a standalone audio file stored on the piece. Outputs MP3 by DEFAULT — already fal-safe, since Seedance reference-to-video @Audio1 accepts MP3/WAV only, so a plain call is correct for a voice reference. Pass format:
This record as markdown: /tools/libi/libi.extract-audio.md
What libi.extract_audio does on Libi
AI agents use libi.extract_audio to create or update resources in Libi, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Libi environment.
Why libi.extract_audio is rated Medium
Creates new audio file from video; reversible, no destructive or execution risk.
From the tool's definition Extract audio stream, stored on piece, outputs MP3
Attacks that exploit this kind of access
The rule that runs libi.extract_audio safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Libi, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For libi.extract_audio, this is the rule to start with:
libi.extract_audio 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Libi, apply this rule, and every libi.extract_audio call is checked against it from then on.
Questions about libi.extract_audio
Extract the audio stream of a video file to a standalone audio file stored on the piece. Outputs MP3 by DEFAULT — already fal-safe, since Seedance reference-to-video @Audio1 accepts MP3/WAV only, so a plain call is correct for a voice reference. Pass format:. It is categorised as a Write tool in the Libi MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Libi MCP server in PolicyLayer and add a rule for libi.extract_audio: 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 Libi. Nothing to install.
libi.extract_audio 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 libi.extract_audio 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 libi.extract_audio. 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.
libi.extract_audio is provided by the Libi MCP server (Nagellabs/libi). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on Libi, and thousands of servers like it.
This server
Across the catalogue