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

Annotations declare readOnlyHint=true and openWorldHint=true, so the safety profile is already provided. The description adds useful return-content context, but does not disclose pagination, result windows for 'upcoming'/'recent', or any other behavioral constraints.

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?

The description is a single efficient sentence with no wasted text. However, it is a sentence fragment rather than a front-loaded action statement, which slightly weakens structure.

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 simple one-parameter read tool, the description gives a reasonable summary of returned content. But with no output schema and no parameter description, it leaves gaps around league_id semantics and the exact scope of 'upcoming' and 'recent'.

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 description coverage is 0%, and the only parameter, league_id, is undocumented beyond its name, type, and required status. The description does not explain where the league ID comes from or any format expectations, so it fails to compensate for the schema 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?

The description names a specific resource and lists its aggregate contents: league, teams (ids), upcoming fixtures, and recent results. It is clearly an overview retrieval for one league, though it does not explicitly differentiate itself from siblings such as get_team, get_matches, or get_standings.

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 guidance on when to use this tool versus alternatives like find_leagues or get_standings. Usage is only implied by the returned content, and no prerequisites or exclusions are stated.

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