AI agents call extract_youtube_comments 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 comments—a read-only operation with no side effects. It does not modify, delete, or execute external actions. The empty description is a minor confidence reducer, but the naming pattern and server context strongly indicate a simple data extraction function. Classified as Read with low severity due to minimal blast radius if misused.
From the tool's definition Tool name 'extract_youtube_comments' indicates retrieval of publicly available YouTube comment data. Server description emphasizes content extraction and analysis from various sources including YouTube videos.
Documented attack patterns abuse exactly the kind of access extract_youtube_comments 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_comments:
{
"version": "1",
"default": "deny",
"tools": {
"extract_youtube_comments": {}
}
}extract_youtube_comments 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_comments. 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_comments: 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_comments 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_comments 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_comments. 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_comments 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.