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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds what the returned records contain (game, catcher/pitcher/runner, target base, throw timing, run-value fields), which is useful, but says nothing about pagination, defaults, or rate behavior.

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 tight sentences with the core action front-loaded and the field list following. No filler, though the sentence is somewhat dense with enumerated fields.

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?

An output schema exists, so return values need not be spelled out, and the description adequately frames the drill-down relationship with the parent tool. The only gap is that pagination and default behavior for the 10 parameters are not addressed.

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 in the schema. The description adds a small amount of meaning by telling the agent which parameters come from the parent leaderboard row (entity_id, year, team stint), but does not explain the remaining filters or pagination params.

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 ('per-attempt play records expanded from one Catcher Throwing catcher row'), and the 'details' expansion clearly positions it against the parent leaderboard tool. It does not name the sibling tool explicitly, but the drill-down relationship is unmistakable.

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 concrete usage context: 'Use the entity_id, year, and team stint from that row', which instructs the agent to first obtain a leaderboard row and then call this. It lacks an explicit when-not-to-use statement, so it falls short of a 5.

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