AI agents call list_documents to retrieve information from Acme without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple listing/enumeration operation that queries and returns document metadata. There are no side effects, no data modification, no code execution, and no destructive operations. It is a straightforward read operation with minimal blast radius—the worst outcome of misuse would be information disclosure of document IDs already stored in the system.
From the tool's definition Tool name 'list_documents' and description 'Return all Acme Robotics documents with their IDs' indicate a retrieval operation with no modification or execution capabilities.
Attacks that exploit this kind of access
Return all Acme Robotics documents with their IDs. It is categorised as a Read tool in the Acme MCP Server, which means it retrieves data without modifying state.
Register the Acme MCP server in PolicyLayer and add a rule for list_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 Acme. Nothing to install.
list_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 list_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 list_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.
list_documents is provided by the Acme MCP server (origin-digital-llc/nested-mcps). 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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