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

With no annotations provided, the description carries the entire burden of explaining behavior. It only states a currency code and says nothing about side effects, return values, validation, or what is done with the parameters. No behavior is disclosed.

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

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

The text is short, but this is under-specification, not purposeful conciseness. A tool with 9 parameters and no annotations needs meaningful explanation; one bare statement about HUF does not earn its place.

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

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

The tool has 9 optional parameters, no output schema, no annotations, and no behavioral description. An agent cannot determine which parameter matters, what the tool returns, or why it exists among 29 siblings. The description is drastically incomplete.

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

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 itself adds no parameter meaning, but the schema documents each parameter. The parameter descriptions are unusual and disconnected from the currency topic, but the schema still carries the documentation burden.

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

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

The description "ISO 4217 currency HUF" is a noun phrase, not a tool action. It does not state a verb, resource behavior, or what calling this tool accomplishes. It also provides no differentiation from sibling tools.

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

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

There is no guidance about when to use this tool versus any sibling. No context, prerequisites, or alternative tool references are given, and the 9 optional parameters offer no usage direction.

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