timer_timer_lap

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

No annotations are provided, so the description must disclose behavioral traits. It only mentions the return format, but does not state side effects (e.g., whether the timer continues, if laps are cumulative, or if there are limits).

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 very short and includes the output format, which is efficient. However, it could be slightly more structured by separating parameter info.

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?

Despite having an implicit output schema, the description lacks explanation of the parameter, prerequisites, and behavioral implications. For a simple tool with one parameter, it is still incomplete.

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 0%, and the description does not explain the purpose of the 'name' parameter. It adds no meaning beyond the input schema, which only lists the parameter as a required string.

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 'Record a lap split' which is a specific action on a timer resource. It distinguishes from sibling tools like timer_start, timer_stop, and timer_elapsed.

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 implies the tool is used to record a lap during a running timer, but it does not provide explicit guidance on when to use it vs. alternatives or any prerequisites (e.g., timer must be started).

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