A simple free greeting tool. No payment required.
AI agents call hello to retrieve information from Paid MCP Server Template without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or returns a static greeting message with no side effects, data modification, code execution, or destructive operations. Despite being hosted on a payment-gated server, this specific tool explicitly states it requires no payment and performs a simple informational read operation.
From the tool's definition Tool is described as 'a simple free greeting tool' that provides a greeting response with no side effects, no payment requirement, and no data modification capabilities.
Attacks that exploit this kind of access
A simple free greeting tool. No payment required. It is categorised as a Read tool in the Paid MCP Server Template MCP Server, which means it retrieves data without modifying state.
Register the Paid MCP Server Template MCP server in PolicyLayer and add a rule for hello: 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 Paid MCP Server Template. Nothing to install.
hello 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 hello 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 hello. 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.
hello is provided by the Paid MCP Server Template MCP server (mainlayer/paid-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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