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 one genuinely useful behavioral fact, that the response comes back as 'several result sets,' which the agent would not otherwise know. It says nothing about upstream availability, rate limits, or what happens when a team has no games in the range.

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 repeated verbatim, wasting the entire second half of the description, and the first half begins with the garbled 'Get Returns.' No information is front-loaded beyond the resource name.

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 and the input schema is fully documented, so the description need not explain return values. However, for a tool with six parameters and many close siblings, the definition omits the routing guidance an agent needs to pick this over nba_player_dash_by_opponent or nba_team_dash_by_game_splits.

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%, with all six parameters documented including defaults for season, per_mode, season_type, and measure_type, so the baseline is 3. The description contributes no additional parameter meaning, such as which measure_type values make the by-opponent split meaningful.

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 text identifies the resource (one team's by-opponent splits) but opens with the malformed phrase 'Get Returns' and never uses a clean verb. It does not distinguish this tool from siblings such as nba_player_dash_by_opponent or nba_team_dash_by_clutch, so the agent must infer the scope from the name alone.

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 mention of alternatives, and no stated prerequisites beyond what the schema already says. The agent is left to infer that this is the team-level counterpart to the player by-opponent tool.

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