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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety and external-data profile is covered. The description adds only topical scope (that results are live events/scores/markets) and discloses nothing further about freshness, rate limits, or auth, which is acceptable but not enriching.

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?

A single front-loaded sentence with no filler or redundancy; it is appropriately sized for a no-argument listing tool. It is a noun fragment rather than a sentence, but nothing wastes 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?

With an output schema present, return values need not be explained, and there are no parameters to cover, so the description is nearly sufficient. Its gap is sibling routing: in a large draftkings_* family it never clarifies how 'live' differs from draftkings_event_markets or draftkings_league_events.

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?

The tool takes zero parameters, so per the baseline there is nothing for the description to document and no syntax to clarify. The schema is fully self-describing for an argument-free call.

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 names a resource and its content ('live events, scores, primary markets, and available event-market categories') but uses no verb, so it never states the action (list/fetch). It partially distinguishes scope with 'live,' yet it does not separate itself from siblings like draftkings_event_markets or draftkings_league_events, which the agent must still disambiguate by schema inspection.

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?

There is no when-to-use guidance, no prerequisites, and no mention of the many sibling tools (draftkings_event, draftkings_odds, draftkings_league_events) that could be chosen instead. The agent is left to infer context entirely.

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