Add and/or drop a player

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

Annotated as destructive, and the description reinforces this with 'DESTRUCTIVE: modifies your real Yahoo roster.' Adds context like defaults to configured team and simultaneous operation. No contradictions with 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?

Four sentences, each earning its place: warning, actions, parameter guidance, usage instruction. Front-loaded with destructive warning. No redundancy.

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?

Lacks information about return values or success/failure indication, which would help the agent understand outcomes. Force parameter behavior is not described. Given no output schema, this is a gap for a destructive action.

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%, so baseline 3. Description adds value by explaining addPlayerKey/dropPlayerKey roles, giving an example key format, and noting teamKey defaults. The force parameter is mentioned in schema but not in description, which is a minor gap.

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?

Clearly states it adds and/or drops a player, using specific verbs and resources. Distinguishes from sibling tools like set_lineup or get_transactions by focusing on roster modifications.

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 to confirm with the user before calling, which is critical for a destructive operation. Explains how to use addPlayerKey, dropPlayerKey, and simultaneous add/drop. Could mention when not to use (e.g., for viewing transactions).

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