get_dolar_hoy

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

No annotations exist, so the description carries the full burden. It does disclose the return content (FIX plus DOF rates and a 30-day window), which is genuinely useful, but says nothing about data freshness, update timing, or whether the call is a pure read.

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?

Extremely short and front-loaded, with the key facts (dollar, today, FIX+DOF, 30d) in the first clause. The full bilingual restatement roughly doubles the length for no added information, which is the only structural waste.

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?

With no annotations, no output schema, and zero parameters, the description is the only documentation. It covers what data sources are returned but leaves 'contexto 30 dias' ambiguous (does it return a 30-day series or just compare against it?) and gives no freshness or update-frequency information.

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?

The tool takes zero parameters, which is the baseline-4 case; there is nothing for the description to clarify about inputs. The description's mention of '30 dias' is arguably a hidden behavior rather than a parameter, so it does not lower this score.

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?

Names a specific resource (USD/MXN dollar today) and even the two data sources it draws on (FIX and DOF), which is more than most sibling names reveal. It lacks a verb and does not explicitly contrast itself with get_divisas_rango or get_tasas_rango, so it is clear but not fully disambiguated from siblings.

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?

Usage is only implied: an agent can infer 'call this when you need today's dollar rate.' There is no statement of when to prefer it over get_divisas_rango (other currencies) or why the built-in 30-day context should be used instead of a range tool.

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