Return the session (user + org) your token authenticates as.
AI agents call whoami to retrieve information from MCP Object-Authz Lab without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a pure information retrieval operation that returns the current authenticated user and organization context. It has no side effects, cannot modify or delete data, and poses minimal risk even if called by an AI agent.
From the tool's definition Tool name 'whoami' and description 'Return the session (user + org) your token authenticates as' indicate it retrieves authentication/identity information without modifying any data or triggering external operations.
Attacks that exploit this kind of access
Return the session (user + org) your token authenticates as. It is categorised as a Read tool in the MCP Object-Authz Lab MCP Server, which means it retrieves data without modifying state.
Register the MCP Object-Authz Lab MCP server in PolicyLayer and add a rule for whoami: 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 Object-Authz Lab. Nothing to install.
whoami 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 whoami 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 whoami. 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.
whoami is provided by the MCP Object-Authz Lab MCP server (wrg-11/mcp-objauthz-lab). 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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