Premium greeting for users with premium role
AI agents call premium-greet to retrieve information from NestJS MCP Server Module without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool appears to be a simple greeting function that conditionally returns a greeting message based on user role validation. It reads/checks user role status to determine what greeting to display, which is a pure read operation with no side effects, reversible modifications, destructive actions, or financial implications.
From the tool's definition Tool name 'premium-greet' and description 'Premium greeting for users with premium role' indicate a greeting/informational function that retrieves and returns greeting content based on user role status.
Attacks that exploit this kind of access
Premium greeting for users with premium role. It is categorised as a Read tool in the NestJS MCP Server Module MCP Server, which means it retrieves data without modifying state.
Register the NestJS MCP Server Module MCP server in PolicyLayer and add a rule for premium-greet: 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 NestJS MCP Server Module. Nothing to install.
premium-greet 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 premium-greet 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 premium-greet. 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.
premium-greet is provided by the NestJS MCP Server Module MCP server (rekog-labs/mcp-nest). 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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