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

Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description goes further by disclosing that results are grouped by betting type and scope and include opening odds, handicap/total lines, selection labels, plus the edge case that a market without bookmakers returns empty lists. It stops short of noting pagination or per-market variability beyond the geo/defaults note.

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 dense and front-loaded with the fetch/return summary before the invocation constraints. The first sentence is long with several modifiers, but each clause carries information rather than filler.

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 a dedicated output schema and annotations covering read-only/open-world behavior, the description only needs to add shape and edge cases, which it does: grouping, fields returned, market scoping, and empty-list handling. Nothing an agent needs to call it correctly is missing.

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 100%, so every parameter is already documented at the schema level, and the description largely restates those constraints (geo default GB, subdivision only US/CA, filtering by betting_type/scope). It adds the framing that the response is scoped to a single viewer market, but no syntax or format detail the schema lacks. 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 (Fetch) and resource (bookmaker odds for a Flashscore match) with the exact output shape: grouped by betting type and scope, with opening odds, handicap/total lines and selection labels. This distinguishes it from sibling match tools and from flashscore_odds_geos, which it references for geo values.

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?

Explains how to invoke it correctly: pass a match id, geo defaults to GB, subdivision is valid only for US or CA, and betting_type/scope narrow the large response. It points to flashscore-odds-geos for valid values, though it never states when to prefer a different sibling or a when-not condition.

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