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IBM

MCP Math Server

by IBM

arabic_to_roman

Convert Arabic numbers to Roman numeral representation using mathematical computation. This tool transforms integer inputs into their classical Roman numeral equivalents for historical, educational, or formatting purposes.

Instructions

Convert an Arabic number to Roman numeral representation. (Domain: arithmetic, Category: general)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
numberYes
Behavior2/5

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

No annotations are provided, so the description carries the full burden. It states the conversion action but does not disclose behavioral traits such as input constraints (e.g., valid number ranges), error handling, or output format. This is a significant gap for a tool with no annotation coverage.

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 extremely concise with a single, direct sentence that states the tool's purpose, followed by domain and category tags. There is no wasted verbiage, and the information is front-loaded effectively.

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

Completeness2/5

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

Given the lack of annotations and output schema, the description is incomplete. It does not address key contextual elements such as valid input ranges, error conditions, or the structure of the Roman numeral output. For a conversion tool with no structured metadata, this leaves significant gaps for an agent.

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?

The schema description coverage is 0%, and the description does not add any parameter-specific information beyond the tool's purpose. It mentions 'Arabic number' which aligns with the 'number' parameter, but provides no details on constraints, format, or examples. Baseline 3 is appropriate as the schema defines the parameter type.

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's purpose with a specific verb ('Convert') and resource ('Arabic number to Roman numeral representation'), and distinguishes it from its sibling 'roman_to_arabic' by specifying the direction of conversion. The domain and category tags provide additional context.

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

Usage Guidelines3/5

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

The description implies usage when conversion from Arabic to Roman numerals is needed, but does not explicitly state when to use this tool versus alternatives (e.g., 'roman_to_arabic' for the reverse operation). It provides basic context but lacks explicit guidance on exclusions or prerequisites.

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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