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

Annotations already declare readOnlyHint and openWorldHint, so the description only needs to add operational context — and it does, by naming the exact marker-verified column set and warning that the player identity column here is CLOSE_DEF_PERSON_ID rather than PLAYER_ID. That key-semantics warning is the kind of detail that prevents bad joins and is not available from annotations or the input schema. It stops short of disclosing row counts, pagination, or ranking 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?

Three tight sentences, front-loaded with the purpose, then the result shape, then the one non-obvious identity caveat. No filler and no repetition of annotation or schema content.

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, the definition does not need to explain return values, and the annotated read-only nature is covered; the column list and identity warning make it safely callable. The remaining gap is routing guidance among the many sibling defensive and box-score tools.

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 (season, per_mode, league_id, season_type, defense_category) is already documented with defaults and valid values. The description adds nothing parameter-specific beyond restating that a single defended-shot category is returned, so the baseline of 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 and resource ('Get NBA defensive tracking dashboard ... the league's defensive tracking table for one defended-shot category'), which is far more concrete than the name alone. It does not explicitly distinguish itself from near-neighbors like nba_box_score_defensive or nba_pt_stats, so an agent must infer the boundary.

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?

Usage is only implied: the phrase 'for one defended-shot category' plus the schema's defense_category default tells the agent how to scope a call, but there is no statement of when to prefer this over sibling defensive/shot tools or when not to use it.

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