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

Annotations already cover read-only, idempotent, non-destructive and closed-world, so the baseline is met without description effort. The description still adds real behavioral context: modules are attached "za zgodą właścicieli" and the response discloses "co serwer modułu zbiera o pytaniach", which is a meaningful data-collection/privacy disclosure an agent could not infer from the annotation set.

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 compact and information-dense: module names with their topic scopes, followed by the returned fields. The single long parenthetical chain is dense but each item earns its place by telling the agent what knowledge sits behind each module; only minor structural improvement (front-loading the return verb) would help.

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 zero-parameter, read-only catalog tool with no output schema, the description supplies both what modules exist and what the response contains, plus the consent and data-collection behavior. The only gap is the absence of explicit routing guidance to the specialized sibling tools, which the module enumeration largely mitigates.

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 takes zero parameters, which is the baseline-4 case per the rubric. The description also correctly implies a parameterless, whole-catalog response, so nothing is missing on this dimension.

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 names a concrete resource ("Moduły wiedzy podłączone do huba") and states what is returned ("Zwraca tematy, narzędzia, warunki korzystania i co serwer modułu zbiera o pytaniach"), so an agent can tell this is a module index rather than a lookup tool. The parenthetical enumeration of Moja Pasza / Moja Serowarnia / Targ Rolny topics further clarifies scope, though the acting verb is buried at the end rather than front-loaded.

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?

Usage is only implied: listing module contents suggests this is a discovery entry point before calling the pasze_*, serowarnia_* or targ_* tools, but the description never says to call it first or when to skip it. No alternatives such as o_hubie or przewodnik are named, and no exclusions are given.

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