Search for similar chunks in the knowledge base
AI agents call search_chunks 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 the knowledge base using semantic search, returning matching documents or text chunks. It has no side effects beyond reading data. While it exposes potentially sensitive documents that may be stored in the knowledge base, the tool itself only retrieves information without altering state, executing code, or causing destructive changes.
From the tool's definition Tool performs 'search for similar chunks in the knowledge base'—a retrieval operation with no modification, deletion, or execution of external code.
Attacks that exploit this kind of access
Search for similar chunks in the knowledge base. 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_chunks: 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_chunks 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_chunks 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_chunks. 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_chunks is provided by the MCP Knowledge Base Server MCP server (maxsmosarski/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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