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 real value beyond that: it lists the verified columns and warns that 'the upstream sends more columns than were confirmed here and they are passed through as-is,' which tells the agent to expect unverified fields in the payload.

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?

Purpose is front-loaded in the first clause and the rest elaborates on payload contents. The long enumeration of column names is partly redundant with the output schema and could be trimmed, but it is organized and free of filler.

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 and readOnly annotations, the return shape and safety profile need not be re-explained, yet roughly half the text does exactly that. The real gap is sibling disambiguation against nba_team_info_common and nba_team_years, which the description never addresses.

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 both team_id and league_id are already documented, including the example id and the note that only league 00 is verified. The description adds nothing about parameter behavior, which is the expected baseline when the schema does the work.

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 opens with a specific verb and resource ('Get NBA franchise background, season history and awards') and enumerates exactly what comes back (background row, season history, championships). It does not name or distinguish itself from the nearest sibling, nba_team_info_common, so an agent can't tell which of the two to prefer from the text 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 or when-not-to-use guidance and no alternative named. The only routing hint ('Required team id from nba-standings') lives in the schema field description, not in the tool description, so the definition itself gives no selection criteria among the many nba_team_* siblings.

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