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aadarshvelu

Derive MCP Server

by aadarshvelu

get_currency

Retrieve detailed information for a individual cryptocurrency or fiat currency by providing its symbol, such as ETH or BTC, to access market data.

Instructions

Get details for a specific currency

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
currencyYesCurrency symbol, e.g. ETH, BTC

Implementation Reference

  • The handler function that makes the API request for 'get_currency'.
    getCurrency(params: GetCurrencyParams): Promise<unknown> {
      return this.post('public/get_currency', params);
    }
  • src/index.ts:50-52 (registration)
    The tool registration and request handling switch case for 'get_currency'.
    case 'get_currency':
      result = await client.getCurrency(a as unknown as GetCurrencyParams);
      break;
  • The tool definition schema for 'get_currency'.
      name: 'get_currency',
      description: 'Get details for a specific currency',
      inputSchema: {
        type: 'object',
        properties: {
          currency: { type: 'string', description: 'Currency symbol, e.g. ETH, BTC' },
        },
        required: ['currency'],
      },
    },
Behavior2/5

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

No annotations are provided, and the description carries the full burden. It omits what constitutes 'details', error behavior for invalid symbols, caching, or rate limiting characteristics.

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

Conciseness4/5

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

Extremely concise at six words with no redundancy. However, it is minimally informative rather than efficiently packed with useful detail.

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?

Adequate for a single-parameter read operation, though the lack of output schema means the description should ideally clarify what 'details' are returned. Sibling differentiation is implied but could be explicit.

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 coverage is 100% with the 'currency' parameter fully documented including examples (ETH, BTC). The description adds no parameter semantics beyond the schema, which is acceptable given the high coverage baseline of 3.

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 uses specific verb 'Get' and resource 'currency', and distinguishes from sibling 'get_all_currencies' by specifying 'specific currency'. However, 'details' is vague regarding what information is returned.

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 provided on when to use this single-currency lookup versus 'get_all_currencies' for bulk operations, or what to do if the currency symbol is unknown.

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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