ticktick_start_stopwatch

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

Annotations already declare readOnlyHint=false, idempotentHint=false, and destructiveHint=false, covering basic safety and idempotency. The description adds valuable context about authentication requirements ('Requires v2 API authentication') and behavioral characteristics ('open-ended focus tracking without a fixed duration'), which aren't captured in annotations. However, it doesn't describe what happens when starting multiple sessions, error conditions, or response format.

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 perfectly concise with three brief sentences that each add value: stating the action, explaining the behavioral characteristic, and specifying authentication requirements. There's zero wasted text, and it's front-loaded with the core purpose. Every sentence earns its place.

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 that the tool has annotations covering basic hints and an output schema exists (though not shown), the description provides adequate context for a simple start operation. However, with 0% schema description coverage and no parameter explanation in the description, there's a significant gap in understanding how to use the tool effectively. The description covers authentication and behavioral context but leaves parameters unexplained.

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%, meaning the schema provides no parameter descriptions. The tool description mentions no parameters at all, failing to explain what 'task_id' or 'task_title' represent or how they affect the stopwatch session. With 1 parameter (a nested object with 2 sub-parameters) and zero coverage, the description should compensate but doesn't, leaving parameters completely undocumented.

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 action ('Start a stopwatch focus session') and resource ('focus session'), making the purpose immediately understandable. It distinguishes from sibling tools like 'ticktick_start_pomodoro' by specifying 'open-ended focus tracking without a fixed duration', though it doesn't explicitly name alternatives. The description avoids tautology by not just restating the tool name.

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 provides some usage context with 'open-ended focus tracking without a fixed duration' and 'Requires v2 API authentication', which helps understand when this tool is appropriate. However, it doesn't explicitly state when to use this versus alternatives like 'ticktick_start_pomodoro' or 'ticktick_stop_focus', nor does it mention prerequisites beyond authentication. The guidance is implied rather than explicit.

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