get_winners_bracket

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

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint=false. The description adds context about the returned data and mentions 'supported playoff sizes', implying limitations. It does not contradict any annotation, and provides useful behavioral context beyond the structured metadata.

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 concise sentences: the first states the core action, the second details the return data, and the third provides usage context and source for the parameter. No redundant phrasing; front-loaded and efficient.

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 no output schema, the description gives a clear enumeration of the returned data (rounds, matchups, IDs, progression, placement), sufficient for an agent to understand what to expect. Usage context and source of the parameter are also covered. Lacks explicit error handling, but that is minor for a read-only tool.

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% (league_id is already well-documented as 'Sleeper league_id obtained from get_user_leagues'). The description repeats this guidance in the usage line, but adds no new meaning beyond the schema. Per calibration, baseline 3 applies for high schema coverage.

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 fetches the league's championship playoff bracket, with specific details on the returned data (rounds, matchups, IDs, progression, placement). It distinguishes itself from siblings like get_losers_bracket by focusing on the championship bracket.

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?

Explicitly instructs when to use it (after or during playoffs) and for what purpose (explain paths, seeds, results, upcoming matchups). Also directs the agent to get league_id from get_user_leagues, providing a clear call flow.

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