搜索知识库中的文档。支持 BM25 + 向量混合召回；可选 cross-encoder rerank 提升精度。
AI agents call search_documents to retrieve information from Personal Knowledge 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 queries documents from the knowledge base without creating, modifying, deleting, or executing code. It is a pure read operation that returns search results based on specified criteria. The hybrid retrieval and reranking are optimization mechanisms for the search, not side-effect operations. No destructive, financial, or execution risk exists.
From the tool's definition Tool name 'search_documents' and description indicate it performs document search with BM25 and vector retrieval ('混合召回') and optional reranking. The description uses 'search' and 'recall' terminology; no modification, deletion, or execution keywords present.
Documented attack patterns abuse exactly the kind of access search_documents gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Personal Knowledge MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_documents:
{
"version": "1",
"default": "deny",
"tools": {
"search_documents": {}
}
}search_documents is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
搜索知识库中的文档。支持 BM25 + 向量混合召回；可选 cross-encoder rerank 提升精度。. It is categorised as a Read tool in the Personal Knowledge MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Personal Knowledge MCP Server MCP server in PolicyLayer and add a rule for search_documents: 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 Personal Knowledge MCP Server. Nothing to install.
search_documents 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 search_documents 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 search_documents. 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.
search_documents is provided by the Personal Knowledge MCP Server MCP server (kyodule/personal-knowledge-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Personal Knowledge 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.
29 Personal Knowledge MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.