timer_timer_stop

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

With no annotations, the description should disclose side effects and error states. It only states it stops a timer and returns data, omitting whether stopping is irreversible, multiple calls effects, or handling of missing timers.

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 (one sentence plus return format), which is efficient but lacks important details. It could be expanded slightly for clarity without losing conciseness.

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?

Given low complexity and presence of output schema, the description is incomplete. It does not address error cases (timer not found), prerequisites, or behavioral nuances like stopping an already stopped timer.

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?

The single parameter 'name' is required but completely undefined in the description. Schema coverage is 0%, and the description adds no meaning beyond the schema's property type. At minimum, it should clarify that name refers to the timer identifier.

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 stops a timer and returns elapsed time fields. The verb 'Stop' and resource 'timer' are specific, and the return format distinguishes it from siblings like timer_timer_start or timer_timer_lap.

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?

No guidance is provided on when to use this tool versus alternatives (e.g., timer_timer_elapsed, timer_timer_reset). The description does not mention prerequisites or exclusions.

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