List all video platforms supported by yt-dlp (1000+ sites including YouTube, Vimeo, TikTok, Twitter, Facebook, Instagram, educational platforms, and more)
AI agents call list_supported_sites to retrieve information from Video Transcriber 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 and enumerates information about which video platforms are supported by the transcriber. It has no side effects, modifies no data, executes no code, and performs no destructive or financial operations. It is purely informational, similar to a help or documentation query. The blast radius of misuse is minimal—an AI agent could only spam requests or waste resources, not compromise data or systems.
From the tool's definition Tool name 'list_supported_sites' and description 'List all video platforms supported' indicate a retrieval operation that returns static or semi-static configuration data about supported platforms.
Attacks that exploit this kind of access
List all video platforms supported by yt-dlp (1000+ sites including YouTube, Vimeo, TikTok, Twitter, Facebook, Instagram, educational platforms, and more). It is categorised as a Read tool in the Video Transcriber MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Video Transcriber MCP Server MCP server in PolicyLayer and add a rule for list_supported_sites: 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 Video Transcriber MCP Server. Nothing to install.
list_supported_sites 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 list_supported_sites 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 list_supported_sites. 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.
list_supported_sites is provided by the Video Transcriber MCP Server MCP server (nhatvu148/video-transcriber-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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