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

Annotations cover read-only and open-world behavior, and the description adds genuinely useful context beyond them: exact price ($0.002 USDC per successful call), payment rails, and the important claim that failed calls are not charged. It omits rate limits or data freshness caveats, keeping it short of a 5.

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?

Front-loaded with purpose and return fields, then season scope, then pricing. Every clause is relevant, though the pricing sentence is somewhat long relative to the core 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?

With an output schema, full schema coverage, and safety annotations already present, the description supplies the remaining essentials: data source, fields returned, season scope, and payment behavior. Nothing an agent needs to invoke it correctly is missing.

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 100% and the single league parameter is already documented with allowed values and a default, so the description's repetition of the four leagues adds little beyond the schema. Baseline 3 applies.

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 and resource ('ESPN standings for NBA, NFL, MLB or NHL') and enumerates the returned fields, which distinguishes it from sibling scoreboard and team-stat tools like dev_espn_nba_scoreboard or dev_nba_stats.

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 implies usage context with 'by conference or division group as ESPN lists them' and 'Current season as ESPN serves it', but it never says when to prefer this over the many ESPN/NBA/MLB stat siblings, nor any exclusions or prerequisites.

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