timeline_seek

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

With no annotations, the description carries the behavioral burden and does state the core effect (playhead moves to a specified second). It does not disclose edge behavior such as clamping to the timeline duration, impact on playback, or what timeline is affected, but the operation is simple and directly stated.

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?

A single front-loaded sentence with no filler; the action and unit are stated immediately and every word 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?

For a one-parameter tool with an output schema present, this is nearly complete: an agent knows the action, target, and unit. It only lacks explicit notes about out-of-range values or which timeline is referenced, but these are minor for basic invocation.

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 coverage is 0% since the property is only a titled number, so the description's "(seconds)" adds the essential unit that fully clarifies how to interpret the position value. It could add bounds or a default, but it resolves the main ambiguity.

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 ("Seek") and resource ("playhead") and adds the unit (seconds), making the intent unmistakable. It does not explicitly contrast with sibling timeline_get_position, but the read-vs-write distinction is clear from the verb.

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 use case: move the playhead to a given time. However, it does not state when this should be used instead of reading the playhead position or whether it applies to the active timeline, so usage context is only implied.

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