AI agents call extract_youtube_transcript to retrieve information from Crawl-MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and extracts existing YouTube video transcripts without modifying, deleting, or executing any operations. It is a data retrieval operation with no side effects, fitting the 'Read' category. Severity is low because transcript extraction poses minimal security risk—it accesses publicly available or user-authorized video data.
From the tool's definition Tool name 'extract_youtube_transcript' indicates extraction/retrieval of transcript data from YouTube videos.
Documented attack patterns abuse exactly the kind of access extract_youtube_transcript gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Crawl-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for extract_youtube_transcript:
{
"version": "1",
"default": "deny",
"tools": {
"extract_youtube_transcript": {}
}
}extract_youtube_transcript is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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extract_youtube_transcript. It is categorised as a Read tool in the Crawl-MCP MCP Server, which means it retrieves data without modifying state.
Register the Crawl- MCP server in PolicyLayer and add a rule for extract_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 Crawl-MCP. Nothing to install.
extract_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 extract_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 extract_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.
extract_youtube_transcript is provided by the Crawl- MCP server (walksoda/crawl-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 19 Crawl-MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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19 Crawl-MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.