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

No annotations are provided, so the description carries the full burden. It does disclose two useful traits: rule-based with no AI ('Sin IA'), and a $0.02 USD per-query cost via x402 payment. That cost/settlement disclosure is genuinely decision-relevant, but it says nothing about what happens on an invalid or unfound NIT, error behavior, or result shape.

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?

Three short sentences, front-loaded with the registry and jurisdiction before the behavioral cost note. No filler. Minor deduction for the unexplained 'x402' abbreviation, which some agents may not resolve.

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 one-parameter lookup this is close to adequate: purpose, jurisdiction, cost and determinism are all covered. However, with no output schema the description should hint at what the response contains (exists / status / renewal date), and it should note the failure mode for an unmatched NIT.

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% and the single 'nit' parameter is already documented in the schema, including that dots, hyphens and the check digit are accepted. The description's 'por NIT' adds no syntax or format detail beyond that, so the baseline of 3 applies.

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?

States a specific verb and resource: it verifies (existence, status, matrícula renewal) a Colombian RUES company by NIT. That specificity (jurisdiction, registry, the three things checked) distinguishes it from siblings like verificador_sic__verificar and registro_marca__consultar without the agent needing to open schemas.

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 when-to-use or when-not-to-use guidance and no naming of alternatives. The agent must infer from the parenthetical '(Colombia)' and the RUES label that this is the registry-of-companies check rather than the SIC or trademark tools. Nothing tells the agent what to do if it needs broader company data instead.

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