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

Annotations already declare readOnlyHint=true, so safety is covered. The description adds the returned field set and the backing API endpoint, which is useful context since no output schema exists, but it does not describe pagination behavior, sorting, or filtering semantics beyond what the schema provides.

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?

Two compact sentences, front-loaded with the purpose and returned fields. The endpoint line is marginally redundant but harmless and lightly useful for API-aware callers.

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 read-only filtered list with no output schema, listing the returned fields is the key addition, and it is present. The parameters are fully described in the schema, and annotations cover safety, so only minor details like pagination behavior or sort order are unstated.

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 all five parameters (start, end, employee_id, page, per_page) are already documented in the input schema. The description adds no parameter-specific meaning beyond that baseline, which is acceptable given the schema does the heavy lifting.

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?

States a specific verb and resource ('List timesheets') and enumerates the fields returned (employee, start, end, working time, break time), so an agent knows exactly what data this tool surfaces. It does not explicitly differentiate itself from sibling list tools such as list_absences, but the resource name is unambiguous.

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 description gives no explicit when-to-use guidance, no prerequisites, and no alternatives. Usage is only implied by the generic 'List' verb, leaving the agent to infer this is for timesheet retrieval rather than absence or assignment retrieval.

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