AI agents call forex_rate 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 |
|---|---|---|---|
api_key | string | — | |
to_currency | string | Yes | |
from_currency | string | Yes |
Parameters from the server's own tool schema.
This tool retrieves financial market data (exchange rates) from an external API (Alpha Vantage). It is a read-only operation that queries data without creating, modifying, deleting, or executing any transactions. No financial commitments, transfers, or irreversible actions are performed. The low severity reflects minimal risk—misuse retrieves stale or incorrect rate data but causes no direct harm.
From the tool's definition Tool name 'forex_rate' and description 'Get a forex exchange rate' indicate a query/retrieval operation with no modification or side effects.
Risk signalsHandles credentials or secrets (api_key)
Attacks that exploit this kind of access
Get a forex exchange rate from Alpha Vantage. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
forex_rate accepts 3 parameters: api_key, to_currency, from_currency. Required: to_currency, from_currency. 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 forex_rate: 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.
forex_rate 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 forex_rate 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 forex_rate. 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.
forex_rate 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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