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

With no annotations, the description carries the full burden. It discloses two useful traits — the data is archived (immutable read) and requires no paid access — but says nothing about return contents, whether a week value is required, or what happens when week is omitted given 0 required parameters.

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?

It is a single front-loaded clause with no filler, but 'no paid dives' reads as internal jargon and the compression leaves key questions (what 'shortlist' means, optionality of week) unanswered.

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, no output schema, and an undocumented optional parameter, the description needs to do more. It never explains what the shortlist returns or how an omitted week is handled, so an agent cannot predict the response shape.

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 coverage is 0% for the single 'week' parameter, so the description must compensate. It confirms the value is an NFL week, matching the schema's 1–18 bounds, but its optionality and default behavior are unexplained.

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 specific verb (read) and resource (archived pre-kickoff NFL Elo predictions for a week), which separates it from get_game_prediction and get_elo_rankings by the 'archived/pre-kickoff' qualifier. However, the term 'shortlist' is never explained, so what the resource actually contains remains ambiguous.

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?

'no paid dives' hints that this is the free counterpart to a paid sibling (get_member_dive), which is implied routing guidance. But there is no explicit 'use this when' statement or named alternative, leaving the agent to infer the tradeoff.

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