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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so safety is covered. The description adds real value beyond that: the output is a comparison table and each value carries its origin/source, and only 2-4 items are accepted — useful expectations for a read tool with no output schema.

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?

Two tight sentences with no filler: the capability and its scope come first, the when-to-use cue second. Nothing repeats the title or wastes space.

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 a 1-param schema and no output schema, the description adequately covers purpose, invocation intent and return shape (table plus provenance). Minor omissions remain, such as behavior with unknown or duplicate slugs, but nothing essential for correct invocation is missing.

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 coverage is 100% and the single parameter already documents the 2-4 slug constraint and its origin (buscar_softwares). The description restates the 2-4 range but adds no new syntax, format or edge-case meaning, so the baseline 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 (compara) and resource (2 a 4 softwares do catálogo) and enumerates exactly what the comparison returns: preço, campos da ficha, integrações, conformidade, com origem e fonte. This clearly separates it from single-record siblings like obter_ficha or search-oriented buscar_softwares.

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?

"Use quando a pessoa quiser saber a diferença entre softwares ou escolher entre eles" gives an explicit triggering intent. It stops short of naming alternatives (e.g., use obter_ficha for one software) or stating when-not, so it is clear context without explicit routing.

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