Retrieve the full content of a specific document by title or file path.
AI agents call get_document 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 retrieves stored document content by title or path without any side effects. It is a straightforward read operation analogous to a GET request or query. No data is created, modified, deleted, or executed. The blast radius is minimal—an AI agent can only access documents already in the knowledge base.
From the tool's definition Tool name is 'get_document' and description states it will 'Retrieve the full content of a specific document' — a pure retrieval operation with no modification or deletion.
Attacks that exploit this kind of access
Retrieve the full content of a specific document by title or file path. 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 get_document: 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.
get_document 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 get_document 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 get_document. 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.
get_document 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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