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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true. The description adds useful behavioral context beyond annotations: it excludes sensitive fields (never SSN or tax ids) and notes that inactive drivers are included when unfiltered.

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 description is short and front-loads return contents before the selection rule. The trailing 'GetDriver.' is redundant but causes minimal waste.

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?

For a low-complexity, read-only lookup with full schema coverage, it gives return contents, privacy behavior, and filtering scope. Minor gaps remain around both-identifier precedence and large unpaginated result behavior, but the description is substantially 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 coverage is 100%, but the description adds conditional selection semantics beyond field documentation: either identifier returns one driver, while neither returns all active and inactive drivers. It does not clarify precedence if both identifiers are supplied.

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?

It names the resource and return contents (driver records, vehicles, file names) and states conditional scope: one driver vs. every active and inactive driver. It does not explicitly contrast with sibling ecourier_list_drivers, so it falls short of a 5.

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?

It explicitly says to supply driver_id or driver_code for one driver, and neither for all active/inactive drivers. It lacks explicit when-not guidance or an alternative sibling recommendation such as ecourier_list_drivers.

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