get_currency

Get details for a specific currency

SERVERDerive MCP Server SOURCEaadarshvelu/derive-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade A, identity unverified Pull the record →

This record as markdown: /tools/aadarshvelu-derive-mcp/get-currency.md

WHAT IT DOES

What get_currency does on Derive MCP Server

AI agents call get_currency to retrieve information from Derive MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_currency is rated Low

This tool queries and retrieves currency details from a public API with no side effects. It does not modify, delete, or execute operations. While financial data is involved, the tool itself performs no financial transactions or operations—it only reads and returns information. This is a straightforward Read operation with low risk.

From the tool's definition Tool name 'get_currency' and description 'Get details for a specific currency' indicate a retrieval operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_currency safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Derive MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_currency, this is the rule to start with:

get_currency Allowed

get_currency is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_currency": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Derive MCP Server, apply this rule, and every get_currency call is checked against it from then on.

FAQ

Questions about get_currency

What does the get_currency tool do? +

Get details for a specific currency. It is categorised as a Read tool in the Derive MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_currency? +

Register the Derive MCP Server MCP server in PolicyLayer and add a rule for get_currency: 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 Derive MCP Server. Nothing to install.

What risk level is get_currency? +

get_currency is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_currency? +

Yes. Add a rate_limit block to the get_currency 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.

How do I block get_currency completely? +

Set action: deny in the PolicyLayer policy for get_currency. 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.

What MCP server provides get_currency? +

get_currency is provided by the Derive MCP Server MCP server (aadarshvelu/derive-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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