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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description does add useful conditional structure (months require a selected season), which is behavioral context beyond the annotations, though it does not discuss auth, rate limits, or default behavior when season is omitted.

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?

Two tight sentences with the enumerated outputs front-loaded and the companion-tool routing second. No filler, though the enumerated list is a little dense.

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 values need not be re-explained. For a simple options/lookup helper the description covers what is listed and how to use it, leaving only minor gaps about omitted-season behavior.

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% for the single 'season' parameter, so the description must compensate. It implies season scopes the month list ('months in a selected season'), giving the parameter meaning, but adds no format, range, or required/optional detail.

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?

States a clear verb ('List') and specific resources: published NFL transaction seasons, months within a season, and team page slugs. It also names the sibling it complements (sportskeeda_transactions), so an agent can distinguish it from the data-fetching tool. Slightly grab-bag but unambiguous.

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?

Explicitly instructs 'Use these values with sportskeeda_transactions', making the intended workflow (lookup first, then fetch) clear. It gives context but no explicit when-not-to-call or exclusion guidance.

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