get_losers_bracket

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is known. The description adds value beyond those by specifying what the returned payload contains (rounds, participants, progression sources, and placement), which helps the agent set expectations for downstream use.

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 compact and well-organized: the primary purpose is front-loaded, followed by a returns summary and then use-case guidance. Every sentence contributes meaning, though the enumerated return items and use cases make it slightly denser than strictly necessary — still earned space.

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?

For a single-parameter, read-only tool with no output schema and no nested objects, the description is nearly complete: it states what the tool does, what it returns, and when to use it. The only minor gap is the lack of explicit mention of the sibling get_winners_bracket as the complementary alternative, but the description covers the essentials.

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% since league_id is the only parameter and it is described as the 'Sleeper league_id.' The description reinforces this by instructing the agent to obtain league_id from get_user_leagues, adding provenance guidance that the schema lacks. With high coverage and the added hint, this exceeds the baseline of 3.

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 uses a specific verb ('Fetch'), names the resource precisely ('the league's consolation or losers playoff bracket'), and distinguishes it from the sibling get_winners_bracket by explicitly covering the losers/consolation side. It also enumerates the returned data (bracket rounds, roster participants, progression sources, winners, losers, placement), leaving no ambiguity about what the tool does.

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 states concrete use cases ('consolation recaps, toilet-bowl analysis, draft-order implications, and remaining postseason matchups') and tells the agent where to obtain the required parameter ('Obtain league_id from get_user_leagues'). It does not explicitly name get_winners_bracket as the not-to-use alternative, but the purpose statement makes the distinction implicit.

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