AI agents call crawler_creator 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 publicly available video information from Bilibili creators. It performs a read-only query operation with no side effects, data modification, deletion, or execution of arbitrary code. The blast radius of misuse is minimal—at worst, it could cause excessive API requests or scrape large volumes of public data, neither of which causes irreversible harm or exposes financial/destructive capabilities.
From the tool's definition Tool name 'crawler_creator' and description '获取 Bilibili UP 主视频' (Get Bilibili creator videos) indicate data retrieval from a public social media platform.
Documented attack patterns abuse exactly the kind of access crawler_creator 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_creator:
{
"version": "1",
"default": "deny",
"tools": {
"crawler_creator": {}
}
}crawler_creator 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 UP 主视频. 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_creator: 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_creator 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_creator 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_creator. 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_creator 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.