AI agents call calc_currency_estimate to retrieve information from UnClick without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
to | string | Yes | |
from | string | Yes | |
amount | number | Yes |
Parameters from the server's own tool schema.
This tool performs a calculation or lookup of currency conversion rates and returns an estimate. It has no side effects, does not modify data, does not execute arbitrary code, does not delete anything, and does not move money. It is a pure informational/computational read operation, making it Read category.
From the tool's definition Tool name 'calc_currency_estimate' and description 'Estimate currency conversion using a rough rate' indicate a query/lookup operation that retrieves or calculates currency conversion data without modifying any state.
Attacks that exploit this kind of access
Estimate currency conversion using a rough rate. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
calc_currency_estimate accepts 3 parameters: to, from, amount. Required: to, from, amount. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for calc_currency_estimate: 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 UnClick. Nothing to install.
calc_currency_estimate 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 calc_currency_estimate 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 calc_currency_estimate. 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.
calc_currency_estimate is provided by the UnClick MCP server (@unclick/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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