Drivers

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds the useful fact that results are session-scoped and enumerates the returned fields (valuable since there is no output schema). It says nothing about default record counts, result-size behavior, or error/permission conditions that the schema only partly hints at.

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?

A single front-loaded sentence with zero filler; the returned-field list is the most useful information and comes first. It is arguably slightly underspecified rather than verbose, but there is no wasted text.

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 eight parameters, no output schema, and full schema coverage, the description does enough to identify the payload fields but not enough to guide scoping decisions (session vs meeting vs season-wide driver_number lookups) or result-size handling. Safety is carried by annotations, so the remaining gap is modest but real.

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 including limit, filters, and the 'latest' sentinel for session_key/meeting_key is fully documented in the schema. The description's field list loosely corresponds to the queryable attributes but adds no filtering syntax or scoping semantics beyond what the schema already provides, so baseline 3 is appropriate.

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 the specific resource (driver details) and enumerates the returned attributes (name, acronym, team, team colour, headshot URL), which is concrete and unambiguous. It does not distinguish this tool from the closest sibling, get_championship_drivers, so an agent must infer that this one returns per-session driver metadata rather than standings.

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 explicit guidance on when to call this versus get_championship_drivers, get_session_result, or get_starting_grid. The phrase 'for a session' weakly implies a session-scoped lookup, but no prerequisites, alternatives, or exclusions are stated.

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