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mwolters-cmyk

PlayerElo MCP server

get_league_ranking

Retrieve the current-season strength order of a league's clubs by their Team Elo rating.

Instructions

A league's clubs ranked by Team Elo (current-season strength order).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
league_idYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

No annotations are provided, so the description carries the burden of behavioral disclosure. It adds useful context by specifying the ranking criterion (Team Elo) and temporal scope (current-season), but it does not state the return format, ordering direction, or any limits/assumptions; read-only behavior is only inferred from the 'get' prefix.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence that immediately states the core result and adds a clarifying parenthetical. It contains no filler, redundant phrasing, or unnecessary details.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With an output schema present and only one parameter, the description sufficiently covers the tool's purpose and output meaning. It lacks only minor details like explicit descending order or pagination, but the output schema likely handles return shape, making the description complete enough for straightforward use.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The only parameter, league_id, has 0% schema description coverage, and the description does not explicitly explain its role beyond implying it selects the league. Since 'A league's clubs' hints at the parameter's purpose, there is minimal added meaning over the schema's title and type, but the description does not compensate for the coverage gap.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool returns a league's clubs ranked by Team Elo, with the parenthetical 'current-season strength order' adding scope. This distinguishes it from siblings like list_leagues (which lists leagues rather than club rankings) and get_club (which targets a single club).

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

There is no explicit guidance about when to use this tool versus alternatives, nor any mention of exclusions or prerequisites. The description only implies usage for current-season club ranking, but it does not name sibling alternatives or define when this tool is preferred.

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

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