Retrieve the full text of a specific document from the knowledge base.
AI agents call get_document to retrieve information from Fourth Brain Demo without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves document content from a knowledge base without creating, modifying, deleting, or executing anything. It has no side effects beyond returning existing information. Low severity because misuse (e.g., accessing marketing content) poses minimal risk to system integrity or data security.
From the tool's definition Tool description states 'Retrieve the full text of a specific document' — a read-only retrieval operation with no modification, deletion, or execution capability.
Attacks that exploit this kind of access
Retrieve the full text of a specific document from the knowledge base. It is categorised as a Read tool in the Fourth Brain Demo MCP Server, which means it retrieves data without modifying state.
Register the Fourth Brain Demo 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 Fourth Brain Demo. 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 Fourth Brain Demo MCP server (rev4nchist/fourth-brain-demo). 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.
Teams ship this data inside their own products. See what a licence covers →