compare_players

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

With no annotations provided, the description carries the full burden. It discloses a behavioral trait ('without hiding their components') meaning the output will include component values, but it does not mention side effects, permissions, or any safety profile. For a read-only comparison tool, this is adequate but not rich.

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 concise, front-loaded sentence with no filler. Every word contributes to meaning: 'Compare,' 'same-horizon,' 'league-scoring,' 'without hiding components.' Excellent structure.

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 are covered, but the description fails to explain required parameters or usage context. With 4 parameters, no annotations, and zero schema description coverage, the description is incomplete for effective tool selection and 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 0%, and the description does not mention any of the 4 parameters (player_ids, horizon, league_id, roster_id). No meaning is added beyond the raw schema, so parameter semantics are completely 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?

Description states a specific action ('Compare') with a clear resource ('same-horizon league-scoring values') and adds a distinguishing qualifier ('without hiding their components'). This differentiates it from sibling tools that might compare values over time or provide summaries.

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 phrase 'same-horizon' implies when to use this tool (comparing players at a specific time horizon), but it gives no explicit when-not guidance or mentions alternatives. This is implied usage, not explicit direction.

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