Search the knowledge base using natural language. Returns the most relevant document chunks.
AI agents call search_knowledge to retrieve information from MCP Knowledge Base Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries a local knowledge base and returns search results. It retrieves data without creating, modifying, deleting, or executing any operations. The 'Returns the most relevant document chunks' phrasing confirms it is a read-only search operation. Low severity because misuse would only expose information the user already has access to within their own knowledge base.
From the tool's definition Tool name 'search_knowledge' and description 'Search the knowledge base using natural language. Returns the most relevant document chunks.' indicate retrieval-only functionality with no modification or execution capabilities.
Attacks that exploit this kind of access
Search the knowledge base using natural language. Returns the most relevant document chunks. It is categorised as a Read tool in the MCP Knowledge Base Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Knowledge Base Server MCP server in PolicyLayer and add a rule for search_knowledge: 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 MCP Knowledge Base Server. Nothing to install.
search_knowledge 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_knowledge 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_knowledge. 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_knowledge is provided by the MCP Knowledge Base Server MCP server (m4k00/mcp-knowledge-base). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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