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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety and open-data profile is covered. The description adds that sorting is applied locally, which is genuine behavioral context beyond the annotations, but it omits return shape and pagination behavior. With annotations carrying the safety profile, a 3 is appropriate.

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 zero filler, and the core action is front-loaded ahead of the filtering details. Slightly terse on routing guidance but no wasted words.

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 and annotations covering the safety profile, the description only needs to convey scope and filtering, which it does. It is complete enough to call correctly, though it stops short of distinguishing itself from the neighboring catcher leaderboards.

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 every parameter is already documented, including the 'from mlb_discovery' hints on sort and team_id. The description restates the filter dimensions (season, team, min 2b/3b attempts, sort, pagination) but adds no syntax or format detail beyond the schema, so the baseline 3 holds.

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 a precise resource ('Baseball Savant Catcher Pop Time leaderboard rows'), which cleanly separates it from the many sibling leaderboards like catcher_throwing, catcher_framing, and catcher_blocking. An agent can identify exactly what data this returns without opening the schema.

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?

The description lists what can be filtered and points to mlb_discovery for exact values, which implies how to supply parameters. However, it gives no explicit when-to-use vs a sibling tool (e.g., catcher_throwing) and no exclusions or prerequisites, leaving usage largely to inference.

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