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

Annotations already declare readOnlyHint and openWorldHint, so safety is covered. The description adds ordering (soonest first), the pagination termination signal (empty page), and the event payload contents, which go beyond the 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?

Two sentences, both front-loaded and free of filler: the first covers purpose, ordering, and payload; the second covers pagination mechanics. Nothing is redundant or padded.

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 re-explained, and the description adequately covers scope, ordering, and termination. The only gap is the absence of routing guidance toward related team endpoints, which is minor for a two-parameter read tool.

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 both id and page are already documented, including the 1-300 range and the event_count=0 stopping rule. The description echoes pagination behavior and adds ordering context but no new per-parameter meaning, so the baseline 3 applies.

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?

States a specific verb and resource ('Returns one page of a Flashscore team's upcoming matches') plus ordering and payload shape, which implicitly separates it from flashscore_team_results (past matches). It never names that sibling explicitly, so an agent must infer the boundary rather than be told it.

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?

Gives practical pagination guidance ('Pass page from 1; an empty page means there are no more fixtures'), which is real usage help. It offers no when-to-use framing against flshscore_team_results or other team endpoints, leaving the past-vs-upcoming decision to inference.

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