Fetch and return the transcript of a YouTube video.
AI agents call get_youtube_transcript to retrieve information from Roam Research MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only fetches and returns data (a YouTube transcript) without modifying, deleting, or executing any operations. It is a straightforward read operation similar to other retrieval tools on the server like 'fetch_pdf_content' and 'fetch_webpage_content'. The blast radius is minimal—an AI agent cannot cause harm by fetching publicly available transcript data.
From the tool's definition Tool name 'get_youtube_transcript' and description 'Fetch and return the transcript of a YouTube video' indicate a retrieval operation with no side effects.
Documented attack patterns abuse exactly the kind of access get_youtube_transcript gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Roam Research MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_youtube_transcript:
{
"version": "1",
"default": "deny",
"tools": {
"get_youtube_transcript": {}
}
}get_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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Fetch and return the transcript of a YouTube video. It is categorised as a Read tool in the Roam Research MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Roam Research 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 Roam Research 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 Roam Research MCP Server MCP server (philosolares/roam-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Roam Research MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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26 Roam Research MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.