Start Timer

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

The description states that the timer will accumulate time until stopped, providing clear behavioral context. However, it does not address what happens if a timer is already running, which is a minor gap.

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 concise with two sentences, front-loaded with the action, and contains no unnecessary information.

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 the simplicity of the tool (one parameter, no output schema, single action), the description sufficiently covers its functionality and effect.

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 'timeslip_id' has a basic schema description, and the tool description does not add additional meaning or context beyond identifying the timeslip.

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 uses a specific verb 'Start' and resource 'timer on a timeslip', clearly distinguishing it from sibling tools like 'freeagent_stop_timer' and 'freeagent_create_timeslip'.

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 usage for starting a timer on an existing timeslip, but it lacks explicit guidance on when to use this tool versus alternatives, such as prerequisites or conditions.

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