Return the authenticated hubNote user
AI agents call current_user to retrieve information from Hubnote Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns information about the currently authenticated user. It performs no modifications, deletions, or external operations. It is a straightforward Read operation with minimal security risk—the worst case being information disclosure about the authenticated user's identity, which is typically low severity.
From the tool's definition Tool name is 'current_user' and description states 'Return the authenticated hubNote user' — a pure retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Return the authenticated hubNote user. It is categorised as a Read tool in the Hubnote Mcp MCP Server, which means it retrieves data without modifying state.
Register the Hubnote MCP server in PolicyLayer and add a rule for current_user: 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 Hubnote Mcp. Nothing to install.
current_user 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 current_user 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 current_user. 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.
current_user is provided by the Hubnote MCP server (wlzerd/hubnote-mcp-server). 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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