Rank free-agent batters

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

Annotations declare readOnlyHint=true, which the description does not contradict. The description adds value by explaining what is returned (ownership, eligibility, stat values) and that performance data is from Yahoo, providing behavioral context beyond the 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?

The description is two sentences, front-loading the core purpose and efficiently listing key return data. Every sentence adds value without verbosity.

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?

Given 5 parameters, no output schema, and minimal annotations, the description explains what the tool returns (ownership, eligibility, stat values) and the stat window. It doesn't describe pagination behavior or sort options in depth, but the schema covers those. Overall adequate for its complexity.

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 100%, so the schema already documents all parameters. The description adds minimal extra semantic value, only implying that the period parameter affects which stat values are returned. Baseline 3 is appropriate.

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 states the specific verb 'Rank' and resource 'free-agent batters', and scopes it to a league by recent Yahoo performance. It lists the returned data (ownership, eligibility, same-day starting status, stat values), distinguishing it from sibling rank tools like rank_game_players and rank_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 clearly indicates the tool is for free-agent batters only, and mentions the stat window (lastweek/lastmonth). It doesn't explicitly state when not to use it or list alternatives, but the narrow scope provides sufficient context for appropriate use.

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