frankfurter-currencies

List the currencies supported by Frankfurter (ECB reference rates).

SERVERMeta Data Mcp SOURCEpypi:meta-data-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-derekslinz-meta-data-mcp/frankfurter-currencies.md

WHAT IT DOES

What frankfurter-currencies does on Meta Data Mcp

AI agents call frankfurter-currencies to retrieve information from Meta Data Mcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why frankfurter-currencies is rated Low

This tool performs a straightforward read operation—querying and listing available currencies from the Frankfurter API. There are no side effects, no data modifications, and no execution of external commands. The blast radius of misuse is minimal: an AI agent could only retrieve currency metadata, which is public information. This is a classic Read category tool.

From the tool's definition Tool name 'frankfurter-currencies' and description 'List the currencies supported by Frankfurter (ECB reference rates)' indicate a query operation that retrieves and lists supported currencies without modifying any data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs frankfurter-currencies safely

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

frankfurter-currencies Allowed

frankfurter-currencies 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": {
    "frankfurter-currencies": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Meta Data Mcp, apply this rule, and every frankfurter-currencies call is checked against it from then on.

FAQ

Questions about frankfurter-currencies

What does the frankfurter-currencies tool do? +

List the currencies supported by Frankfurter (ECB reference rates). It is categorised as a Read tool in the Meta Data Mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on frankfurter-currencies? +

Register the Meta Data MCP server in PolicyLayer and add a rule for frankfurter-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 Meta Data Mcp. Nothing to install.

What risk level is frankfurter-currencies? +

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

Can I rate-limit frankfurter-currencies? +

Yes. Add a rate_limit block to the frankfurter-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.

How do I block frankfurter-currencies completely? +

Set action: deny in the PolicyLayer policy for frankfurter-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.

What MCP server provides frankfurter-currencies? +

frankfurter-currencies is provided by the Meta Data MCP server (pypi:meta-data-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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