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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds valuable behavioral nuance by explaining that production is from last season and ADP already prices in injuries, trades, and rookies, preventing misinterpretation of the gap. No contradiction with annotations.

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?

Three sentences carry definition, directional interpretation, intended usage, and a caveat with zero repetition. The core concept is front-loaded and every sentence adds meaning. This is an efficiently structured description.

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?

The definition, interpretation of both directions, use case, and key data caveats are all present, and the output schema covers return structure. For a read-only tool with four optional parameters, nothing critical is missing for an agent to call and interpret the tool correctly.

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 75%, with limit lacking a description. The tool description helps by explaining what earlier/later than production means, reinforcing the direction enum semantics, and the schema itself documents position and scoring_format well. The limit parameter remains undocumented in both schema and description, a minor residual gap.

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 opens with a precise definition: players whose consensus ADP disagrees most with production ranking. It distinguishes itself from raw rankings by explicitly declaring 'This is a disagreement, NOT a recommendation,' and the earlier/later explanation grounds the directional semantics. This clearly differentiates the tool from siblings like get_rankings or compare_players.

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 gives an explicit use case: 'Use this for draft-prep questions about who the room may be mispricing.' It also provides a clear when-not-to-use signal by stating the output is not a recommendation. However, it does not name alternative sibling tools or state when to prefer them, so it stops short of full routing guidance.

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