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

Annotations already establish that this is a safe, read-only, idempotent list operation. The description adds meaningful context beyond that: default date range, aggregation behavior (totals per day and project), admin-only scoping via user_id, and permission-gated revenue visibility. It does not mention pagination or result limits, keeping it below a 5.

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 compact sentences with no obvious filler. The default date range is front-loaded and the admin and revenue caveats follow logically. Slightly clearer wording around 'in docket' would improve it marginally.

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 no output schema, the description appropriately explains the key return characteristics: time entries with totals per day and per project, plus conditional revenue visibility. It does not detail entry-level fields or ordering, but for a simple list tool this covers the essential behavior.

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 the schema already documents from, to, user_id, and project_id in detail. The description reinforces the default date range and admin-only behavior for user_id, but adds little beyond the schema and does not mention project_id at all.

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 states a specific verb and resource ('time entries in a date range') and adds useful scope details like default week and per-day/per-project totals. It does not explicitly distinguish itself from potential siblings such as my_week, so it stops 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 implies the primary use case (viewing one's own entries for a date range) and notes the admin escalation path for other users' or everyone's entries. However, it does not name alternatives like my_week or explain when not to use this tool, leaving usage guidance only partially explicit.

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