Clock In (Attendance)

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

Annotations provide no special hints, so description carries full burden. It discloses that the tool records a clock-in and returns an entry with status='open', but does not mention potential side effects like duplicate clock-in prevention or permissions.

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, consisting of two English sentences and a Spanish repetition. It is front-loaded with the main purpose. The bilingual aspect slightly increases length but is not excessive.

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 clock-in tool, the description covers purpose, optional parameters, return status, and pairing with clock_out. Given that output schema exists (so return details are not needed here) and schema covers parameters, this is fairly complete. Missing details about error conditions but adequate.

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 descriptions already cover all three parameters. The tool description adds minimal context by labeling mood as 'employee well-being tracking' and location as 'remote/office/site'. With 100% schema coverage, baseline is 3; description adds marginal value.

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 clearly states the tool records a clock-in, optionally captures mood and location, and returns an attendance entry with status='open'. It distinguishes from sibling attendance_clock_out by mentioning pairing.

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 context by stating 'Pair with attendance_clock_out to close the entry,' implying when to use this tool (to start a shift) and that clock_out is the complementary tool. However, it does not explicitly state when not to use (e.g., if already clocked in).

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