AI agents call crawler_detail to retrieve information from MediaCrawler 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 video detail information from Bilibili, a Chinese video platform. It fetches and extracts data (video metadata, description, statistics, etc.) but does not create, modify, delete, or execute any operations. The operation is read-only with no side effects on the platform or data.
From the tool's definition Tool name 'crawler_detail' and description '获取 Bilibili 视频详情' (Get Bilibili video details) indicates retrieval of video metadata and information without modification or side effects.
Documented attack patterns abuse exactly the kind of access crawler_detail gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MediaCrawler MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for crawler_detail:
{
"version": "1",
"default": "deny",
"tools": {
"crawler_detail": {}
}
}crawler_detail is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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获取 Bilibili 视频详情. It is categorised as a Read tool in the MediaCrawler MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MediaCrawler MCP Server MCP server in PolicyLayer and add a rule for crawler_detail: 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 MediaCrawler MCP Server. Nothing to install.
crawler_detail 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 crawler_detail 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 crawler_detail. 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.
crawler_detail is provided by the MediaCrawler MCP Server MCP server (mcp-service/media-crawler-mcp-service). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MediaCrawler MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
5 MediaCrawler MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.