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

The readOnlyHint annotation already establishes this as a safe read operation, and the description is consistent with that. It adds the behavioral context of ranking by a selected investment theme, but it does not explain beyond that, such as whether the ranking is precomputed, what source it uses, or how the returned data is ordered. Since the annotation covers safety, a mid-range score is appropriate.

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, front-loaded sentence with no filler, which is efficient. It could be slightly more informative by noting the no-theme behavior or the ranking basis, but it is not bloated or repetitive.

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?

Given that the tool is simple, has two optional parameters, and benefits from a read-only annotation and a fully documented schema, the description is mostly sufficient for correct invocation. The main shortfall is that the description alone does not communicate that omitting theme lists available themes, though the schema does cover this. It also does not mention return shape, but no output schema exists to make that unnecessary.

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 schema already documents both parameters at 100% coverage, including the default limit and the meaning of omitting theme. The description adds little parameter meaning beyond the phrase 'wybranego motywu' reflecting the theme parameter. This matches the baseline for high schema coverage.

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 'Ranking spółek w obrębie wybranego motywu inwestycyjnego' clearly communicates ranking companies within an investment theme. It distinguishes the thematic angle from siblings like rank_revenue_growth, though it does not state the ranking criterion or ordering, and it does not explicitly mention the no-theme fallback behavior.

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 guidance about when to use this tool versus alternatives such as rank_revenue_growth or get_stock_rankings. The description implies thematic ranking is the context, but it does not provide exclusions, prerequisites, or alternatives. The only usage hint comes from the theme parameter's schema, not the description.

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