List the current user
AI agents call list-billing to retrieve information from Auth0 OIDC MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves user information without modifying or deleting data. While the name suggests it may access billing information (which could be sensitive), the description explicitly states it only lists the current user—a read-only operation.
From the tool's definition Tool name 'list-billing' combined with description 'List the current user' indicates a retrieval operation.
Attacks that exploit this kind of access
List the current user. It is categorised as a Read tool in the Auth0 OIDC MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Auth0 OIDC MCP Server MCP server in PolicyLayer and add a rule for list-billing: 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 Auth0 OIDC MCP Server. Nothing to install.
list-billing 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-billing 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-billing. 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-billing is provided by the Auth0 OIDC MCP Server MCP server (moeki0/mcp-auth0-oidc). 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 →