sleeper_playoff_bracket

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

Annotations already indicate read-only, idempotent, and open-world behavior. The description adds value by disclosing the exact return format ({r, m, t1, t2, w, l, t1_from, t2_from}) and explaining the meaning of each key. It also notes 'Auth: none needed,' which is a practical behavioral detail 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 mostly efficient, with a clear purpose line, a compact return format spec, and an example. However, the final line 'Also answers this: espnfantasy_matchups, espnfantasy_matchup_score.' is cryptic and does not earn its place; it is likely confusing to an agent and reduces overall clarity.

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 the rich annotations and full schema coverage, the description is fairly complete. It provides the return format, which compensates for the lack of an output schema, and includes an example and auth note. It does not mention error cases (e.g., no playoff bracket available), but for a simple read-only tool this is not a significant gap.

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 descriptions cover 100% of parameters, so the baseline is 3. The description gives an example bracket value ('winners_bracket') but does not add meaningful semantic detail beyond the schema. The league_id parameter is described in the schema as 'part of the URL path,' and the description does not elaborate further.

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 clearly states the tool's function: 'The playoff bracket — who plays whom in each round, and who advanced.' This is a specific verb+resource with a clear scope. It also distinguishes itself from siblings like sleeper_matchups by focusing on the playoff bracket specifically, and the 'Also answers this' line hints at its relationship to fantasy matchups tools.

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 provides an example call and notes that no auth is needed, giving basic usage context. However, it does not explicitly state when to use this tool over alternatives like sleeper_matchups or espnfantasy_matchups. The 'Also answers this' line is ambiguous and does not clearly guide tool selection. No exclusions or alternative recommendations are given.

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