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

Annotations already declare the tool as read-only, idempotent, and non-destructive, so the safety profile is covered. The description adds the useful semantic distinction that this tool exposes planned procurements (PCA) rather than actual contracts, but it does not mention pagination behavior, response format, or other operational details.

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, compact sentence that front-loads the resource type and key filters. It contains no filler, redundant wording, or repetition of schema details.

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 read-only tool with two required filters and two optional pagination parameters, the description is largely adequate: it explains the core subject matter and the filter semantics. It is not fully complete because there is no output schema and no description of the return payload, but the low complexity keeps the gap from being severe.

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?

With 0% schema description coverage, the description carries the burden for parameter meaning. It successfully maps the two required parameters: ano_pca corresponds to the year and codigo_classificacao_superior to the superior catalog classification. The pagination parameters are left implicit but their names make them reasonably self-explanatory.

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 annual contracting plan (PCA) filtered by year and superior catalog classification, and adds a clarifying clause about what agencies plan to contract. It is specific enough to distinguish the tool from siblings like pncp_contratos or pncp_oportunidades, though it lacks an explicit retrieval verb such as 'list' or 'get'.

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 provides no guidance on when to choose this tool over the many sibling pncp_* tools. There is no mention of exclusions, prerequisites, or alternative tools, so the intended usage context must be inferred entirely from the resource name and description.

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