Extract transcript from a YouTube video
AI agents call get_youtube_transcript to retrieve information from YouTube Tools MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves pre-existing transcript data from YouTube videos. It queries and returns information without creating, modifying, deleting, executing code, or moving money. The action is passive data retrieval. Low severity because misuse would only expose publicly available video transcripts.
From the tool's definition Tool description states 'Extract transcript from a YouTube video' — a retrieval operation with no modification, deletion, or code execution.
Attacks that exploit this kind of access
Extract transcript from a YouTube video. It is categorised as a Read tool in the YouTube Tools MCP Server MCP Server, which means it retrieves data without modifying state.
Register the YouTube Tools MCP Server MCP server in PolicyLayer and add a rule for get_youtube_transcript: 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 YouTube Tools MCP Server. Nothing to install.
get_youtube_transcript is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_youtube_transcript 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 get_youtube_transcript. 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.
get_youtube_transcript is provided by the YouTube Tools MCP Server MCP server (n3s-online/youtube-tools-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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