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 the granularity contract (one row per game, box-score line), which is genuinely useful behavioral context. It says nothing about pagination, row volume for an 82-game season, or coverage limits for older seasons, which with annotations present keeps this at a 3.

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 single sentence is duplicated verbatim, so half the description is dead weight, and the leading "Get Returns" is a malformed artifact rather than a front-loaded phrase. The content itself is compact once the duplication is removed. Structure is weak because the useful clause about one row per game appears twice instead of being followed by any usage or behavior detail.

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 shape need not be explained, and all four parameters are fully described in the schema. What remains missing is any routing guidance among the many player-log-adjacent siblings and any note on scope limits such as season availability. For a low-complexity read tool that is adequate but not complete.

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%: season format YYYY-YY, league_id 00 only, player_id sourcing from nba-players or nba-team-roster, and season_type are all documented in the schema. The description adds no parameter meaning beyond that, so the baseline 3 applies. Note the schema marks player_id as required in its own description while the tool reports zero required parameters, but that inconsistency lives in the schema, not the description.

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 verb and resource: one player's game log for a season, with one row per game and a box-score line. That is enough to tell it apart from team-level and split-dashboard siblings, though it never explicitly contrasts itself with them. The garbled opener "Get Returns" and the verbatim repetition of the sentence blur an otherwise clear purpose.

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 when-to-use guidance, no prerequisites, and no named alternative such as nba_team_game_logs or nba_player_dash_by_last_n_games. An agent must infer from the name alone that this is the per-game, single-player, season-scoped option. Only the implicit 'one player, one season, per game' scope hints at usage.

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