AI agents call me to retrieve information from Hardcover without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves user profile information without modifying, deleting, or executing any operations. It is a simple read-only query of the authenticated user's metadata. The blast radius of misuse is minimal—an attacker could only learn user account details, not modify them or access other users' data (implicitly, given the 'authenticated' context suggests proper access controls).
From the tool's definition Tool name 'me' and description 'Get authenticated user info (id, username, name, books count)' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
Get authenticated user info (id, username, name, books count). It is categorised as a Read tool in the Hardcover MCP Server, which means it retrieves data without modifying state.
Register the Hardcover MCP server in PolicyLayer and add a rule for me: 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 Hardcover. Nothing to install.
me 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 me 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 me. 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.
me is provided by the Hardcover MCP server (kristianedlund/hardcover-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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