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i-am-david-weinstein

ESPN Fantasy MCP Server

get_free_agents

Get a list of free agents on the waiver wire, filtered by position and league, to help identify players to add to your fantasy roster.

Instructions

Get list of available free agents on the waiver wire.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sizeNoNumber of players to return (default: 50)
positionNoFilter by position (C, 1B, 2B, SS, 3B, OF, SP, RP, P)
league_idNoESPN League ID
season_yearNoSeason year (defaults to current year)

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations are provided, so the description must fully disclose behavior. It only states 'get list' without mentioning pagination, ordering, or any other behavior. This leaves the agent uncertain about what the response contains.

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

Conciseness4/5

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

The description is a single, short sentence with no wasted words. However, some additional context could be provided without harming conciseness.

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?

For a simple retrieval tool with an output schema (presumably documenting return structure), the description is adequate. It covers the core functionality but lacks details like default sorting or behavior if no parameters are provided.

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

Parameters3/5

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

All parameters are described in the input schema (100% coverage). The description adds no extra meaning beyond what the schema already provides, meeting the baseline expectation.

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 retrieves a list of free agents on the waiver wire, using a specific verb and resource. It effectively distinguishes from sibling tools like add_free_agent or drop_player.

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

Usage Guidelines3/5

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

There is no explicit guidance on when to use this tool versus alternatives. Usage is implied as 'when you need to see available free agents', but no context or exclusions are provided.

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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