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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and openWorldHint=false, so safety is covered. The description adds genuinely new behavior: each row carries the change since the last update plus a league-page link, and rows lacking a CrystlQuant number fall back to the Blind model and are labeled as such. The one gap is that the response shape or pagination across leagues isn't described.

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?

Three tight sentences, front-loaded with what the tool returns and followed by the two things an agent couldn't guess: the Blind-model fallback labeling and the per-league limit. Branding terms like CrystlQuant are used without explanation but don't consume extra 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 two-parameter, no-required-argument read tool with full schema coverage and no output schema, the description covers the content of each row, the fallback case, and the limit semantics. What remains unstated, such as whether omitting sport returns all leagues and how links are formatted, is minor rather than blocking.

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% and both parameters are already documented, including the enum values for sport. The description does add one meaningful clarification beyond the schema, stating that the limit is applied per league, which changes how an agent should set it.

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 states a specific resource: each league's likeliest champions, sourced from CrystlQuant season forecasts, with change since last update and a league link. That is concrete enough to separate it from a plain rankings tool, but it never names or contrasts any sibling (rankings, biggest_gaps, todays_board), so differentiation is left to the agent.

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 explicit when-to-use statement, no exclusion, and no named alternative. The agent must infer from the content that this is the season-long championship outlook rather than the day-to-day or ranking tools offered by its siblings.

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