AI agents call list_files to retrieve information from MCP RAG 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 file metadata from the RAG system without creating, modifying, deleting, or executing any operations. It is a pure read operation with minimal blast radius — listing files cannot cause data loss, financial impact, or unintended code execution.
From the tool's definition Tool name is 'list_files' and description states 'List all files in the RAG system' — a retrieval operation with no modification or side effects.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
List all files in the RAG system. It is categorised as a Read tool in the MCP RAG MCP Server, which means it retrieves data without modifying state.
Register the MCP RAG MCP server in PolicyLayer and add a rule for list_files: 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 RAG. Nothing to install.
list_files 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 list_files 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 list_files. 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.
list_files is provided by the MCP RAG MCP server (santis84/mcp-rag). 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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