Semantic search over indexed document chunks with optional filters.
AI agents call search_knowledge_base to retrieve information from Caseware Kb 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 data from a knowledge base without any side effects. It does not create, modify, delete, execute commands, or commit financial transactions. The optional filters refine the search query but do not alter underlying data. This is a classic Read operation with minimal blast radius if misused—an agent might retrieve unintended documents, but no data is lost or changed.
From the tool's definition Tool performs 'semantic search over indexed document chunks' with optional filters. The verb 'search' combined with the read-only operation of querying indexed documents indicates pure data retrieval with no modification, creation, or deletion capabilities.
Attacks that exploit this kind of access
Semantic search over indexed document chunks with optional filters. It is categorised as a Read tool in the Caseware Kb MCP Server, which means it retrieves data without modifying state.
Register the Caseware Kb MCP server in PolicyLayer and add a rule for search_knowledge_base: 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 Caseware Kb. Nothing to install.
search_knowledge_base 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_base 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_base. 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_base is provided by the Caseware Kb MCP server (leonardorhojas/caseware-procurement-kb). 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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