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

Beyond the readOnly, non-destructive, and closed-world annotations, the description discloses material behavior: team users receive per-entry who/when data, client users receive only a total and only for billed hours, and the result is null when time is not tracked. That is substantive behavioral context not available from the annotations alone.

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-loaded, moving from purpose to team output, client visibility, and the null condition without filler. The final 'null when...' clause is slightly elliptical but still clear and earns its place.

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 simple one-parameter read tool, the description covers the key return semantics — total versus per-entry team view — along with role-based visibility and the null case. With annotations covering safety and the schema covering the parameter, no significant invocation information is missing.

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?

The only parameter, requestId, is fully described in the schema as 'Request ID.' The description does not add syntax, format, or selection guidance beyond that, so with 100% schema coverage the schema carries parameter semantics.

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 a specific resource — time logged on a request — and states the shape of what comes back: the total plus per-entry team details. It is clearly the time-focused getter rather than a generic request getter, though it does not explicitly contrast itself with sibling tools such as get_request_billing.

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 implied by the purpose: fetch logged time for a request. The description gives no explicit when-to-use/when-not guidance or named alternative, but the role-based visibility rules ('clients see only the total...') add useful invocation context.

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