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

Annotations already declare this as read-only, non-destructive, and open-world, so the description does not need to restate safety. It adds useful behavior beyond annotations: times are in seconds, omitted user_id resolves to the admin user the key acts as, and the result includes all entries with ids required for later updates or deletes.

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 compact and front-loaded: the core scope appears immediately, followed by the key default behavior and units. Every sentence adds useful information with no 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 no output schema, the description usefully explains that the result includes all entries and their ids, and that times are in seconds. It is nearly complete for a small read tool, though it could mention what happens when no timesheet exists or whether the response is empty.

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 the schema already explains both the date format and user_id omission behavior. The description reinforces that user_id omission means the admin user, but adds little parameter detail beyond what the schema provides.

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 resource and precise scope: the timesheet of ONE employee for ONE day, including all entries and their ids. This clearly differentiates it from list-oriented siblings such as kiwihr_list_timesheets by emphasizing single-employee, single-day retrieval.

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?

The scope and the note that entry ids are needed to update or delete an entry give clear implied usage context. It does not explicitly say when to use this versus kiwihr_list_timesheets, but the single-employee/single-day constraint provides strong routing guidance.

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