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FrankfurterMCP

by anirbanbasu
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Remote

Get Latest Exchange Rates

get_latest_exchange_rates
Read-only

Get current exchange rates for a base currency, filterable to specific target currencies, for conversions and comparisons.

Instructions

Returns the latest exchange rates for specific currencies.

The symbols can be used to filter the results to specific currencies. If symbols is not provided, all supported currencies will be returned.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
symbolsNoA list of target currency ISO4217 codes for which rates against the base currency will be provided. If not provided, all supported currencies will be shown.
base_currencyYesA base currency ISO4217 code for which rates are to be requested.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changed
    • addedInput schema / additionalProperties
      Added value: +false
    • changedInput schema / properties / base_currency / enum
      Previous value: -[
-  "AED",
-  "AFN",
-  "ALL",
-  "AMD",
-  "ANG",
-  "AOA",
-  "ARS",
-  "AUD",
-  "AWG",
-  "AZN",
-  "BAM",
-  "BBD",
-  "BDT",
-  "BGN",
-  "BHD",
-  "BIF",
-  "BMD",
-  "BND",
-  "BOB",
-  "BOV",
-  "BRL",
-  "BSD",
-  "BTN",
-  "BWP",
-  "BYN",
-  "BZD",
-  "CAD",
-  "CDF",
-  "CHE",
-  "CHF",
-  "CHW",
-  "CLF",
-  "CLP",
-  "CNY",
-  "COP",
-  "COU",
-  "CRC",
-  "CUC",
-  "CUP",
-  "CVE",
-  "CZK",
-  "DJF",
-  "DKK",
-  "DOP",
-  "DZD",
-  "EGP",
-  "ERN",
-  "ETB",
-  "EUR",
-  "FJD",
-  "FKP",
-  "GBP",
-  "GEL",
-  "GHS",
-  "GIP",
-  "GMD",
-  "GNF",
-  "GTQ",
-  "GYD",
-  "HKD",
-  "HNL",
-  "HRK",
-  "HTG",
-  "HUF",
-  "IDR",
-  "ILS",
-  "INR",
-  "IQD",
-  "IRR",
-  "ISK",
-  "JMD",
-  "JOD",
-  "JPY",
-  "KES",
-  "KGS",
-  "KHR",
-  "KMF",
-  "KPW",
-  "KRW",
-  "KWD",
-  "KYD",
-  "KZT",
-  "LAK",
-  "LBP",
-  "LKR",
-  "LRD",
-  "LSL",
-  "LYD",
-  "MAD",
-  "MDL",
-  "MGA",
-  "MKD",
-  "MMK",
-  "MNT",
-  "MOP",
-  "MRU",
-  "MUR",
-  "MVR",
-  "MWK",
-  "MXN",
-  "MXV",
-  "MYR",
-  "MZN",
-  "NAD",
-  "NGN",
-  "NIO",
-  "NOK",
-  "NPR",
-  "NZD",
-  "OMR",
-  "PAB",
-  "PEN",
-  "PGK",
-  "PHP",
-  "PKR",
-  "PLN",
-  "PYG",
-  "QAR",
-  "RON",
-  "RSD",
-  "RUB",
-  "RWF",
-  "SAR",
-  "SBD",
-  "SCR",
-  "SDG",
-  "SEK",
-  "SGD",
-  "SHP",
-  "SLE",
-  "SLL",
-  "SOS",
-  "SRD",
-  "SSP",
-  "STN",
-  "SVC",
-  "SYP",
-  "SZL",
-  "THB",
-  "TJS",
-  "TMT",
-  "TND",
-  "TOP",
-  "TRY",
-  "TTD",
-  "TWD",
-  "TZS",
-  "UAH",
-  "UGX",
-  "USD",
-  "USN",
-  "UYI",
-  "UYU",
-  "UYW",
-  "UZS",
-  "VED",
-  "VES",
-  "VND",
-  "VUV",
-  "WST",
-  "XAF",
-  "XAG",
-  "XAU",
-  "XBA",
-  "XBB",
-  "XBC",
-  "XBD",
-  "XCD",
-  "XDR",
-  "XOF",
-  "XPD",
-  "XPF",
-  "XPT",
-  "XSU",
-  "XTS",
-  "XUA",
-  "XXX",
-  "YER",
-  "ZAR",
-  "ZMW",
-  "ZWL"
-]New value: +[
+  "AED",
+  "AFN",
+  "ALL",
+  "AMD",
+  "AOA",
+  "ARS",
+  "AUD",
+  "AWG",
+  "AZN",
+  "BAM",
+  "BBD",
+  "BDT",
+  "BHD",
+  "BIF",
+  "BMD",
+  "BND",
+  "BOB",
+  "BOV",
+  "BRL",
+  "BSD",
+  "BTN",
+  "BWP",
+  "BYN",
+  "BZD",
+  "CAD",
+  "CDF",
+  "CHE",
+  "CHF",
+  "CHW",
+  "CLF",
+  "CLP",
+  "CNY",
+  "COP",
+  "COU",
+  "CRC",
+  "CUP",
+  "CVE",
+  "CZK",
+  "DJF",
+  "DKK",
+  "DOP",
+  "DZD",
+  "EGP",
+  "ERN",
+  "ETB",
+  "EUR",
+  "FJD",
+  "FKP",
+  "GBP",
+  "GEL",
+  "GHS",
+  "GIP",
+  "GMD",
+  "GNF",
+  "GTQ",
+  "GYD",
+  "HKD",
+  "HNL",
+  "HTG",
+  "HUF",
+  "IDR",
+  "ILS",
+  "INR",
+  "IQD",
+  "IRR",
+  "ISK",
+  "JMD",
+  "JOD",
+  "JPY",
+  "KES",
+  "KGS",
+  "KHR",
+  "KMF",
+  "KPW",
+  "KRW",
+  "KWD",
+  "KYD",
+  "KZT",
+  "LAK",
+  "LBP",
+  "LKR",
+  "LRD",
+  "LSL",
+  "LYD",
+  "MAD",
+  "MDL",
+  "MGA",
+  "MKD",
+  "MMK",
+  "MNT",
+  "MOP",
+  "MRU",
+  "MUR",
+  "MVR",
+  "MWK",
+  "MXN",
+  "MXV",
+  "MYR",
+  "MZN",
+  "NAD",
+  "NGN",
+  "NIO",
+  "NOK",
+  "NPR",
+  "NZD",
+  "OMR",
+  "PAB",
+  "PEN",
+  "PGK",
+  "PHP",
+  "PKR",
+  "PLN",
+  "PYG",
+  "QAR",
+  "RON",
+  "RSD",
+  "RUB",
+  "RWF",
+  "SAR",
+  "SBD",
+  "SCR",
+  "SDG",
+  "SEK",
+  "SGD",
+  "SHP",
+  "SLE",
+  "SOS",
+  "SRD",
+  "SSP",
+  "STN",
+  "SVC",
+  "SYP",
+  "SZL",
+  "THB",
+  "TJS",
+  "TMT",
+  "TND",
+  "TOP",
+  "TRY",
+  "TTD",
+  "TWD",
+  "TZS",
+  "UAH",
+  "UGX",
+  "USD",
+  "USN",
+  "UYI",
+  "UYU",
+  "UYW",
+  "UZS",
+  "VED",
+  "VES",
+  "VND",
+  "VUV",
+  "WST",
+  "XAD",
+  "XAF",
+  "XAG",
+  "XAU",
+  "XBA",
+  "XBB",
+  "XBC",
+  "XBD",
+  "XCD",
+  "XCG",
+  "XDR",
+  "XOF",
+  "XPD",
+  "XPF",
+  "XPT",
+  "XSU",
+  "XTS",
+  "XUA",
+  "XXX",
+  "YER",
+  "ZAR",
+  "ZMW",
+  "ZWG"
+]
    • changedInput schema / properties / symbols / anyOf
      Previous value: -[
-  {
-    "items": {
-      "enum": [
-        "AED",
-        "AFN",
-        "ALL",
-        "AMD",
-        "ANG",
-        "AOA",
-        "ARS",
-        "AUD",
-        "AWG",
-        "AZN",
-        "BAM",
-        "BBD",
-        "BDT",
-        "BGN",
-        "BHD",
-        "BIF",
-        "BMD",
-        "BND",
-        "BOB",
-        "BOV",
-        "BRL",
-        "BSD",
-        "BTN",
-        "BWP",
-        "BYN",
-        "BZD",
-        "CAD",
-        "CDF",
-        "CHE",
-        "CHF",
-        "CHW",
-        "CLF",
-        "CLP",
-        "CNY",
-        "COP",
-        "COU",
-        "CRC",
-        "CUC",
-        "CUP",
-        "CVE",
-        "CZK",
-        "DJF",
-        "DKK",
-        "DOP",
-        "DZD",
-        "EGP",
-        "ERN",
-        "ETB",
-        "EUR",
-        "FJD",
-        "FKP",
-        "GBP",
-        "GEL",
-        "GHS",
-        "GIP",
-        "GMD",
-        "GNF",
-        "GTQ",
-        "GYD",
-        "HKD",
-        "HNL",
-        "HRK",
-        "HTG",
-        "HUF",
-        "IDR",
-        "ILS",
-        "INR",
-        "IQD",
-        "IRR",
-        "ISK",
-        "JMD",
-        "JOD",
-        "JPY",
-        "KES",
-        "KGS",
-        "KHR",
-        "KMF",
-        "KPW",
-        "KRW",
-        "KWD",
-        "KYD",
-        "KZT",
-        "LAK",
-        "LBP",
-        "LKR",
-        "LRD",
-        "LSL",
-        "LYD",
-        "MAD",
-        "MDL",
-        "MGA",
-        "MKD",
-        "MMK",
-        "MNT",
-        "MOP",
-        "MRU",
-        "MUR",
-        "MVR",
-        "MWK",
-        "MXN",
-        "MXV",
-        "MYR",
-        "MZN",
-        "NAD",
-        "NGN",
-        "NIO",
-        "NOK",
-        "NPR",
-        "NZD",
-        "OMR",
-        "PAB",
-        "PEN",
-        "PGK",
-        "PHP",
-        "PKR",
-        "PLN",
-        "PYG",
-        "QAR",
-        "RON",
-        "RSD",
-        "RUB",
-        "RWF",
-        "SAR",
-        "SBD",
-        "SCR",
-        "SDG",
-        "SEK",
-        "SGD",
-        "SHP",
-        "SLE",
-        "SLL",
-        "SOS",
-        "SRD",
-        "SSP",
-        "STN",
-        "SVC",
-        "SYP",
-        "SZL",
-        "THB",
-        "TJS",
-        "TMT",
-        "TND",
-        "TOP",
-        "TRY",
-        "TTD",
-        "TWD",
-        "TZS",
-        "UAH",
-        "UGX",
-        "USD",
-        "USN",
-        "UYI",
-        "UYU",
-        "UYW",
-        "UZS",
-        "VED",
-        "VES",
-        "VND",
-        "VUV",
-        "WST",
-        "XAF",
-        "XAG",
-        "XAU",
-        "XBA",
-        "XBB",
-        "XBC",
-        "XBD",
-        "XCD",
-        "XDR",
-        "XOF",
-        "XPD",
-        "XPF",
-        "XPT",
-        "XSU",
-        "XTS",
-        "XUA",
-        "XXX",
-        "YER",
-        "ZAR",
-        "ZMW",
-        "ZWL"
-      ],
-      "maxLength": 3,
-      "minLength": 3,
-      "type": "string"
-    },
-    "type": "array"
-  },
-  {
-    "enum": [
-      "AED",
-      "AFN",
-      "ALL",
-      "AMD",
-      "ANG",
-      "AOA",
-      "ARS",
-      "AUD",
-      "AWG",
-      "AZN",
-      "BAM",
-      "BBD",
-      "BDT",
-      "BGN",
-      "BHD",
-      "BIF",
-      "BMD",
-      "BND",
-      "BOB",
-      "BOV",
-      "BRL",
-      "BSD",
-      "BTN",
-      "BWP",
-      "BYN",
-      "BZD",
-      "CAD",
-      "CDF",
-      "CHE",
-      "CHF",
-      "CHW",
-      "CLF",
-      "CLP",
-      "CNY",
-      "COP",
-      "COU",
-      "CRC",
-      "CUC",
-      "CUP",
-      "CVE",
-      "CZK",
-      "DJF",
-      "DKK",
-      "DOP",
-      "DZD",
-      "EGP",
-      "ERN",
-      "ETB",
-      "EUR",
-      "FJD",
-      "FKP",
-      "GBP",
-      "GEL",
-      "GHS",
-      "GIP",
-      "GMD",
-      "GNF",
-      "GTQ",
-      "GYD",
-      "HKD",
-      "HNL",
-      "HRK",
-      "HTG",
-      "HUF",
-      "IDR",
-      "ILS",
-      "INR",
-      "IQD",
-      "IRR",
-      "ISK",
-      "JMD",
-      "JOD",
-      "JPY",
-      "KES",
-      "KGS",
-      "KHR",
-      "KMF",
-      "KPW",
-      "KRW",
-      "KWD",
-      "KYD",
-      "KZT",
-      "LAK",
-      "LBP",
-      "LKR",
-      "LRD",
-      "LSL",
-      "LYD",
-      "MAD",
-      "MDL",
-      "MGA",
-      "MKD",
-      "MMK",
-      "MNT",
-      "MOP",
-      "MRU",
-      "MUR",
-      "MVR",
-      "MWK",
-      "MXN",
-      "MXV",
-      "MYR",
-      "MZN",
-      "NAD",
-      "NGN",
-      "NIO",
-      "NOK",
-      "NPR",
-      "NZD",
-      "OMR",
-      "PAB",
-      "PEN",
-      "PGK",
-      "PHP",
-      "PKR",
-      "PLN",
-      "PYG",
-      "QAR",
-      "RON",
-      "RSD",
-      "RUB",
-      "RWF",
-      "SAR",
-      "SBD",
-      "SCR",
-      "SDG",
-      "SEK",
-      "SGD",
-      "SHP",
-      "SLE",
-      "SLL",
-      "SOS",
-      "SRD",
-      "SSP",
-      "STN",
-      "SVC",
-      "SYP",
-      "SZL",
-      "THB",
-      "TJS",
-      "TMT",
-      "TND",
-      "TOP",
-      "TRY",
-      "TTD",
-      "TWD",
-      "TZS",
-      "UAH",
-      "UGX",
-      "USD",
-      "USN",
-      "UYI",
-      "UYU",
-      "UYW",
-      "UZS",
-      "VED",
-      "VES",
-      "VND",
-      "VUV",
-      "WST",
-      "XAF",
-      "XAG",
-      "XAU",
-      "XBA",
-      "XBB",
-      "XBC",
-      "XBD",
-      "XCD",
-      "XDR",
-      "XOF",
-      "XPD",
-      "XPF",
-      "XPT",
-      "XSU",
-      "XTS",
-      "XUA",
-      "XXX",
-      "YER",
-      "ZAR",
-      "ZMW",
-      "ZWL"
-    ],
-    "maxLength": 3,
-    "minLength": 3,
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "items": {
+      "enum": [
+        "AED",
+        "AFN",
+        "ALL",
+        "AMD",
+        "AOA",
+        "ARS",
+        "AUD",
+        "AWG",
+        "AZN",
+        "BAM",
+        "BBD",
+        "BDT",
+        "BHD",
+        "BIF",
+        "BMD",
+        "BND",
+        "BOB",
+        "BOV",
+        "BRL",
+        "BSD",
+        "BTN",
+        "BWP",
+        "BYN",
+        "BZD",
+        "CAD",
+        "CDF",
+        "CHE",
+        "CHF",
+        "CHW",
+        "CLF",
+        "CLP",
+        "CNY",
+        "COP",
+        "COU",
+        "CRC",
+        "CUP",
+        "CVE",
+        "CZK",
+        "DJF",
+        "DKK",
+        "DOP",
+        "DZD",
+        "EGP",
+        "ERN",
+        "ETB",
+        "EUR",
+        "FJD",
+        "FKP",
+        "GBP",
+        "GEL",
+        "GHS",
+        "GIP",
+        "GMD",
+        "GNF",
+        "GTQ",
+        "GYD",
+        "HKD",
+        "HNL",
+        "HTG",
+        "HUF",
+        "IDR",
+        "ILS",
+        "INR",
+        "IQD",
+        "IRR",
+        "ISK",
+        "JMD",
+        "JOD",
+        "JPY",
+        "KES",
+        "KGS",
+        "KHR",
+        "KMF",
+        "KPW",
+        "KRW",
+        "KWD",
+        "KYD",
+        "KZT",
+        "LAK",
+        "LBP",
+        "LKR",
+        "LRD",
+        "LSL",
+        "LYD",
+        "MAD",
+        "MDL",
+        "MGA",
+        "MKD",
+        "MMK",
+        "MNT",
+        "MOP",
+        "MRU",
+        "MUR",
+        "MVR",
+        "MWK",
+        "MXN",
+        "MXV",
+        "MYR",
+        "MZN",
+        "NAD",
+        "NGN",
+        "NIO",
+        "NOK",
+        "NPR",
+        "NZD",
+        "OMR",
+        "PAB",
+        "PEN",
+        "PGK",
+        "PHP",
+        "PKR",
+        "PLN",
+        "PYG",
+        "QAR",
+        "RON",
+        "RSD",
+        "RUB",
+        "RWF",
+        "SAR",
+        "SBD",
+        "SCR",
+        "SDG",
+        "SEK",
+        "SGD",
+        "SHP",
+        "SLE",
+        "SOS",
+        "SRD",
+        "SSP",
+        "STN",
+        "SVC",
+        "SYP",
+        "SZL",
+        "THB",
+        "TJS",
+        "TMT",
+        "TND",
+        "TOP",
+        "TRY",
+        "TTD",
+        "TWD",
+        "TZS",
+        "UAH",
+        "UGX",
+        "USD",
+        "USN",
+        "UYI",
+        "UYU",
+        "UYW",
+        "UZS",
+        "VED",
+        "VES",
+        "VND",
+        "VUV",
+        "WST",
+        "XAD",
+        "XAF",
+        "XAG",
+        "XAU",
+        "XBA",
+        "XBB",
+        "XBC",
+        "XBD",
+        "XCD",
+        "XCG",
+        "XDR",
+        "XOF",
+        "XPD",
+        "XPF",
+        "XPT",
+        "XSU",
+        "XTS",
+        "XUA",
+        "XXX",
+        "YER",
+        "ZAR",
+        "ZMW",
+        "ZWG"
+      ],
+      "maxLength": 3,
+      "minLength": 3,
+      "type": "string"
+    },
+    "type": "array"
+  },
+  {
+    "enum": [
+      "AED",
+      "AFN",
+      "ALL",
+      "AMD",
+      "AOA",
+      "ARS",
+      "AUD",
+      "AWG",
+      "AZN",
+      "BAM",
+      "BBD",
+      "BDT",
+      "BHD",
+      "BIF",
+      "BMD",
+      "BND",
+      "BOB",
+      "BOV",
+      "BRL",
+      "BSD",
+      "BTN",
+      "BWP",
+      "BYN",
+      "BZD",
+      "CAD",
+      "CDF",
+      "CHE",
+      "CHF",
+      "CHW",
+      "CLF",
+      "CLP",
+      "CNY",
+      "COP",
+      "COU",
+      "CRC",
+      "CUP",
+      "CVE",
+      "CZK",
+      "DJF",
+      "DKK",
+      "DOP",
+      "DZD",
+      "EGP",
+      "ERN",
+      "ETB",
+      "EUR",
+      "FJD",
+      "FKP",
+      "GBP",
+      "GEL",
+      "GHS",
+      "GIP",
+      "GMD",
+      "GNF",
+      "GTQ",
+      "GYD",
+      "HKD",
+      "HNL",
+      "HTG",
+      "HUF",
+      "IDR",
+      "ILS",
+      "INR",
+      "IQD",
+      "IRR",
+      "ISK",
+      "JMD",
+      "JOD",
+      "JPY",
+      "KES",
+      "KGS",
+      "KHR",
+      "KMF",
+      "KPW",
+      "KRW",
+      "KWD",
+      "KYD",
+      "KZT",
+      "LAK",
+      "LBP",
+      "LKR",
+      "LRD",
+      "LSL",
+      "LYD",
+      "MAD",
+      "MDL",
+      "MGA",
+      "MKD",
+      "MMK",
+      "MNT",
+      "MOP",
+      "MRU",
+      "MUR",
+      "MVR",
+      "MWK",
+      "MXN",
+      "MXV",
+      "MYR",
+      "MZN",
+      "NAD",
+      "NGN",
+      "NIO",
+      "NOK",
+      "NPR",
+      "NZD",
+      "OMR",
+      "PAB",
+      "PEN",
+      "PGK",
+      "PHP",
+      "PKR",
+      "PLN",
+      "PYG",
+      "QAR",
+      "RON",
+      "RSD",
+      "RUB",
+      "RWF",
+      "SAR",
+      "SBD",
+      "SCR",
+      "SDG",
+      "SEK",
+      "SGD",
+      "SHP",
+      "SLE",
+      "SOS",
+      "SRD",
+      "SSP",
+      "STN",
+      "SVC",
+      "SYP",
+      "SZL",
+      "THB",
+      "TJS",
+      "TMT",
+      "TND",
+      "TOP",
+      "TRY",
+      "TTD",
+      "TWD",
+      "TZS",
+      "UAH",
+      "UGX",
+      "USD",
+      "USN",
+      "UYI",
+      "UYU",
+      "UYW",
+      "UZS",
+      "VED",
+      "VES",
+      "VND",
+      "VUV",
+      "WST",
+      "XAD",
+      "XAF",
+      "XAG",
+      "XAU",
+      "XBA",
+      "XBB",
+      "XBC",
+      "XBD",
+      "XCD",
+      "XCG",
+      "XDR",
+      "XOF",
+      "XPD",
+      "XPF",
+      "XPT",
+      "XSU",
+      "XTS",
+      "XUA",
+      "XXX",
+      "YER",
+      "ZAR",
+      "ZMW",
+      "ZWG"
+    ],
+    "maxLength": 3,
+    "minLength": 3,
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]
  2. Added
  3. Removed
  4. First observed

TDQS

B3.3/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds the filtering behavior (symbols narrows results; omitting it returns all currencies), which is useful context beyond annotations. However, it doesn't disclose return format or whether rates are against base_currency, leaving some gaps.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three sentences with zero waste. The main purpose is front-loaded in the first sentence, followed by two sentences explaining the optional parameter's behavior. Every sentence earns its place and no irrelevant details are included.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple 2-parameter read-only tool with 100% schema coverage, the description covers the essential behaviors. It lacks return-format details and sibling differentiation, but the schema handles parameter documentation. Adequate but not rich; it doesn't fully compensate for the absence of an output schema.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the baseline is 3. The description's statements about symbols ('can be used to filter the results', 'If symbols is not provided, all supported currencies will be returned') largely duplicate what the schema already documents. It adds no new syntax or format details beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific verb and resource ('Returns the latest exchange rates'), which is clear and distinct from siblings. 'Latest' implies recency and differentiates from get_historical_exchange_rates, though it doesn't explicitly name siblings. The purpose is unambiguous for an agent.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool versus alternatives. The description never mentions get_historical_exchange_rates, convert_currency_latest, or get_supported_currencies, nor conditions that select among them. The only guidance present concerns the symbols parameter's filter behavior, not tool selection.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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