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

No annotations are present, so the description carries the behavioral burden. It usefully discloses that rates are live and based on MAD, and that only EuroCollis-supported currencies are accepted. However, it does not mention whether the operation is read-only, what happens on invalid currency codes, or how rates/rounding are handled.

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 description is a single sentence with no filler. It front-loads the action and includes the most relevant constraint (supported currencies, live MAD-based rates) without repeating schema information.

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?

For a simple three-parameter conversion tool, the description is minimally viable: an agent knows to provide an amount and two supported currencies. However, with no output schema and no parameter-level documentation, it lacks detail on return format, currency code conventions, amount restrictions, and error behavior.

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 0% and no enums exist. The description only generally references 'amount' and 'currencies', adding the fact that currencies must be EuroCollis-supported but failing to explain amount constraints, currency code format, or the roles of from_currency and to_currency in any detail. The property names are self-explanatory, but the description does not compensate for the schema gap.

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 uses a specific verb ('Convert') and names a clear resource: an amount between EuroCollis-supported currencies. It also adds the distinguishing detail that rates are live and MAD-based. No sibling tool performs currency conversion, so this definition makes selection unambiguous.

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?

The description implies the tool is for converting amounts between supported currencies, but it does not state when to prefer it over alternatives or mention any related tools such as get_quote or estimate_customs. There is no explicit context or exclusion guidance.

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