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

No annotations are provided, so the description carries the behavioral transparency burden. It clearly signals a read-only navigation operation through 'Navigate' and 'lists,' and it discloses the exact output level for each parameter combination. It does not discuss auth, rate limits, or error behavior, but those are less central for this simple listing tool.

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 entire definition is a single, front-loaded sentence with no filler. Every clause adds a concrete navigation rule, making it information-dense while remaining easy to parse.

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 no annotations and no output schema, the description must explain enough about expected results, and it does: each level returns sports with counts, years, products, or sets. It is slightly incomplete because it does not address invalid or mixed parameter combinations, and it does not route to sibling tools, but it is otherwise sufficient for correct invocation.

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%, so the baseline is 3. The description goes beyond the schema by defining the valid combinations of optional parameters and what each combination yields, which is meaningful semantic information the schema alone does not fully convey.

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 specific action ('Navigate the database hierarchy') and then explains exactly what each input combination returns. It clearly reads as an exploration/list tool rather than a search, lookup, or identify tool, so an agent can distinguish it from siblings like get_card or search_cards.

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 a clear mini-navigation guide: no arguments lists sports, sport lists years, sport + year lists products, and product_id lists sets. It does not explicitly mention when not to use this tool or point to alternatives, so it misses full exclusion guidance, but the usage context is clear.

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