List the business entities and personal spaces the authenticated user
AI agents call list_entities to retrieve information from Luni MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation that enumerates entities the user has access to. While it provides access to sensitive financial information scope (business entities and personal spaces), the tool itself does not modify, delete, or execute operations—it only retrieves and lists data.
From the tool's definition Tool name 'list_entities' and description 'List the business entities and personal spaces the authenticated user' indicate a query operation that retrieves and displays existing data with no modifications, deletions, or side effects.
Attacks that exploit this kind of access
List the business entities and personal spaces the authenticated user. It is categorised as a Read tool in the Luni MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Luni MCP Server MCP server in PolicyLayer and add a rule for list_entities: 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 Luni MCP Server. Nothing to install.
list_entities 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_entities 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_entities. 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_entities is provided by the Luni MCP Server MCP server (rorygeddes/luni_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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