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Boe Uk

by io.github.pipeworx-io
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Usd Gbp

usd_gbp
Read-onlyIdempotent

Latest N observations of the USD/GBP spot rate — US$ per £1 (series XUDLUSS), most recent first.

Example tool call

This call uses example arguments supplied in the tool’s input schema.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "last": 20
    },
    "name": "usd_gbp"
  }
}

Input Schema

NameRequiredDescriptionDefault
lastNoNumber of most-recent observations (default 10).

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • addedInput schema / examples
      Added value: +[
+  {
+    "last": 20
+  }
+]
  2. First observed

TDQS

A4.3/5.0
Behavior4/5

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

Annotations already cover read-only and non-destructive behavior. The description adds useful behavioral details: observations are returned most recent first and refer to a specific series (XUDLUSS). No contradictions with annotations.

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?

The description is a single, concise sentence that front-loads the primary function and includes essential details (currency pair, unit, series, ordering) without any wasted words.

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

Completeness5/5

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

For a simple one-parameter tool with strong annotations and no output schema, the description is complete. It explains what is returned (observations), the ordering, and the series identity, leaving no critical gaps.

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%, so the parameter 'last' is already well-documented. The description uses 'N' implicitly but adds no additional semantics beyond what the schema provides. Baseline 3 is appropriate.

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

Purpose5/5

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

The description clearly states the tool retrieves the latest N observations of the USD/GBP spot rate, defines the rate as US$ per £1, and identifies the specific series (XUDLUSS). This distinguishes it from sibling tools like eur_gbp.

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

Usage Guidelines4/5

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

The context of use is clear: it provides USD/GBP spot rate observations. However, it does not explicitly mention alternatives or exclusions, such as 'use eur_gbp for EUR/GBP,' which would elevate it to a 5.

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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