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

readOnlyHint=true already tells the agent this is a safe read, so the bar is lower. The description adds what the response contains (clock-in/out, breaks, late minutes, hours, approval state) and the underlying endpoint, but says nothing about pagination behavior, sorting, or empty-result handling.

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 short sentences, front-loaded with the resource and returned fields. The trailing 'GET /attendance' is marginal value for an agent but adds almost no length.

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 9 parameters, no output schema, and full schema coverage, the description usefully compensates for the missing output schema by enumerating the returned record fields and the required time-range scope. It stops short of describing ordering or how totals/next_offset behave across pages.

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%: the schema already explains the timestamp/ISO formats for start/end, limit capping, next_offset usage, and the filter semantics for users/roles/locations/approved/include_deleted. The description adds no parameter-level detail beyond that, so the baseline 3 applies.

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 (list) and resource (time & attendance records) and enumerates the returned fields (clock-in/out, breaks, minutes late, hours, approval state), which is more than a name restatement. It does not explicitly differentiate itself from the close sibling rotacloud_list_clocked_in, leaving the agent to infer the range-vs-current-state distinction.

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 time-range scope is stated, implying usage for historical/period attendance queries. However, there is no explicit when-to-use guidance, no exclusion of alternatives (e.g. list_clocked_in), and no prerequisites such as permission needs.

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