AI agents call bookstack_search to retrieve information from BookStack MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Despite the empty description, the tool name and server context indicate this is a search/query function. Search is a read-only operation with no side effects. The low severity reflects minimal blast radius—an AI agent misusing search could retrieve unintended information but cannot modify, delete, or execute actions.
From the tool's definition Tool name is 'bookstack_search' and server description indicates 'full-text search capabilities across all content entities.' Search operations retrieve data without modification.
Documented attack patterns abuse exactly the kind of access bookstack_search gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and BookStack MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for bookstack_search:
{
"version": "1",
"default": "deny",
"tools": {
"bookstack_search": {}
}
}bookstack_search is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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bookstack_search. It is categorised as a Read tool in the BookStack MCP Server MCP Server, which means it retrieves data without modifying state.
Register the BookStack MCP Server MCP server in PolicyLayer and add a rule for bookstack_search: 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 BookStack MCP Server. Nothing to install.
bookstack_search 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 bookstack_search 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 bookstack_search. 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.
bookstack_search is provided by the BookStack MCP Server MCP server (oculairmedia/bookstack-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from BookStack 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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11 BookStack MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.