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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds that results include team counts and can be narrowed by subdivision, which is modest but real context beyond the annotations; it says nothing about ordering or result size.

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?

One sentence, zero filler, with the resource and return content front-loaded before the optional filter. Nothing could be removed without losing information.

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?

An output schema exists, so return shape needn't be explained, and the single parameter's domain is covered. What is missing is the relationship to the near-identical sibling list_conferences, leaving an agent to guess which one to call.

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 0% – the schema exposes a bare 'subdivision' string with no enum or description. The description compensates by naming the valid domain (FBS/FCS) and noting the parameter is optional, which is the key meaning an agent needs to call it correctly.

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?

Specific verb+resource: 'List football conferences and team counts' tells the agent exactly what comes back, and 'optionally by FBS/FCS' scopes it to football subdivisions. It does not, however, distinguish itself from the sibling 'list_conferences', which an agent would reasonably confuse with this tool.

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 only usage signal is 'optionally by FBS/FCS', which describes the parameter rather than when to choose this tool. There is no statement of when to use it versus list_conferences or get_conference_stats, and no prerequisites or exclusions.

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