tasa_bcv

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

With no annotations, the description carries the behavioral burden. It discloses the source (BCV) and unit semantics, which is useful, but does not state freshness, authentication needs, whether it is read-only, or error behavior. For a zero-parameter rate lookup this is minimally adequate but has clear gaps.

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?

A single, front-loaded sentence that states the source, resource, and unit of return. Every element earns its place with no filler.

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 zero-parameter rate-fetching tool with no output schema, the description sufficiently explains what is returned: official BCV rates in bolívares per USD and EUR. It could add freshness or usage context, but the core call semantics are complete.

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 has zero parameters, so the baseline is 4. The description appropriately does not invent parameter details, and the USD/EUR mention clarifies the implicit scope of the lookup.

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 clearly identifies the resource as the official BCV exchange rate and specifies the output units: bolívares per 1 USD and per 1 EUR. It distinguishes itself from tasa_p2p by emphasizing 'oficial' and 'Banco Central de Venezuela', though it does not explicitly name or route against 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?

There is no explicit guidance on when to use this tool versus tasa_p2p, convertir, or brecha_cambiaria. The official-source framing implies a use case, but the definition leaves the agent to infer selection criteria.

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