Search the ${surface.label} surface when the exact topic is unknown. For large corpora, call list_sources first and pass a returned scope value, such as
AI agents call search_documents to retrieve information from Open MCP Knowledgebase 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 document content without creating, modifying, or deleting data. It has no side effects beyond returning search results. The recommendation to 'call list_sources first' further indicates passive information retrieval. This is a straightforward Read operation with minimal security risk.
From the tool's definition Tool name 'search_documents' and description 'Search the ${surface.label} surface' indicates querying/retrieving data. The phrase 'when the exact topic is unknown' confirms it is a search operation for discovery purposes, not modification.
Attacks that exploit this kind of access
Search the ${surface.label} surface when the exact topic is unknown. For large corpora, call list_sources first and pass a returned scope value, such as. It is categorised as a Read tool in the Open MCP Knowledgebase MCP Server, which means it retrieves data without modifying state.
Register the Open MCP Knowledgebase 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 Open MCP Knowledgebase. 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 Open MCP Knowledgebase MCP server (no-product/knowledgebase-mcp). 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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