AI agents call crow_bookstack_get_page to retrieve information from Crow without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries a page from BookStack (a documentation platform integration). There are no side effects, no data modification, no command execution, and no destructive operations. This is a straightforward read operation with minimal security risk—the only concern would be unauthorized access to sensitive documentation, which is a standard access control issue rather than a tool-specific vulnerability.
From the tool's definition Tool name 'crow_bookstack_get_page' with description 'Get a page' indicates a retrieval operation. The verb 'get' and lack of any modification, deletion, or execution language confirm read-only behavior.
Documented attack patterns abuse exactly the kind of access crow_bookstack_get_page gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Crow, and nothing reaches the server without passing your rules. This is the rule we recommend for crow_bookstack_get_page:
{
"version": "1",
"default": "deny",
"tools": {
"crow_bookstack_get_page": {}
}
}crow_bookstack_get_page is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get a page. It is categorised as a Read tool in the Crow MCP Server, which means it retrieves data without modifying state.
Register the Crow MCP server in PolicyLayer and add a rule for crow_bookstack_get_page: 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 Crow. Nothing to install.
crow_bookstack_get_page 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 crow_bookstack_get_page 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 crow_bookstack_get_page. 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.
crow_bookstack_get_page is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Crow, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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576 Crow tools catalogued and risk-classified — across an index of 43,000+ MCP servers.