Get configured currencies
AI agents call whmcs_get_currencies to retrieve information from Whmcs without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves configured currency information from WHMCS without modifying, executing, or deleting anything. It is a query operation with no blast radius if misused by an AI agent, as it only exposes existing configuration data.
From the tool's definition Tool name 'whmcs_get_currencies' and description 'Get configured currencies' indicate a retrieval operation with no side effects. The verb 'Get' and the nature of querying configuration data aligns with the Read category definition.
Documented attack patterns abuse exactly the kind of access whmcs_get_currencies gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Whmcs, and nothing reaches the server without passing your rules. This is the rule we recommend for whmcs_get_currencies:
{
"version": "1",
"default": "deny",
"tools": {
"whmcs_get_currencies": {}
}
}whmcs_get_currencies is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get configured currencies. It is categorised as a Read tool in the Whmcs MCP Server, which means it retrieves data without modifying state.
Register the Whmcs MCP server in PolicyLayer and add a rule for whmcs_get_currencies: 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 Whmcs. Nothing to install.
whmcs_get_currencies 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 whmcs_get_currencies 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 whmcs_get_currencies. 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.
whmcs_get_currencies is provided by the Whmcs MCP server (scarecr0w12/whmcs-mcp-tool). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Whmcs, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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