AI agents call search_knowledge to retrieve information from ATMcp 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 creating, modifying, deleting, or executing operations. It is a pure read operation that may return different results based on query parameters, but carries minimal risk.
From the tool's definition Tool performs 'full-text search the team knowledge base' with optional query parameter. The description explicitly indicates read-only search functionality with no mention of modifications, deletions, or side effects.
Attacks that exploit this kind of access
Full-text search the team knowledge base (FTS5). Omit query to list recent. It is categorised as a Read tool in the ATMcp MCP Server, which means it retrieves data without modifying state.
Register the AT 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 ATMcp. 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 AT MCP server (midcheck/atmcp). 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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