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exchangerate_convert

Convert any amount from one currency to another using real-time exchange rates.

Instructions

Convert an amount from one currency to another.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
fromYesSource currency code (e.g. USD)
toYesTarget currency code (e.g. EUR)
amountNoAmount to convert (default 1)
api_keyNoOptional for conversion (uses latest rates if omitted)
Behavior2/5

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

With no annotations, the description must carry behavioral disclosure. It only states conversion, omitting details like rate source, authentication needs, error handling, or side effects.

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?

Single sentence, no redundancy. Could be more structured but is efficiently concise.

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?

No output schema provided; description does not mention return format. Adequate for simple tool but incomplete for richer context.

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 baseline is 3. Description adds no meaning beyond schema; parameter descriptions are already clear in 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 clearly states the tool converts currency amounts, using a specific verb and resource. However, it does not differentiate from sibling tools like forex_convert or exchangerate_historical, which also perform conversions.

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 vs alternatives. Does not specify prerequisites, context, or when the optional api_key is needed.

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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