set_start_time

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

No annotations are present, so the description alone must disclose side effects, prerequisites, or mutation behavior. It only repeats that the tool 'set[s] start time' and offers no information about what changes, whether it requires an active sequence or selection, or whether the operation is reversible.

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 short, but its only substantive clause is a restatement of the tool name, and the 'Premiere Pro expanded operation' prefix is generic filler. It is concise in length but not in information content; it earns a middle score rather than a strong one.

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 zero-parameter, no-annotation, no-output-schema tool, the description still leaves a critical ambiguity: the target of 'start time'. An agent cannot know whether to call this on the active sequence, a selected clip, or some other context, especially when a similarly named set_clip_start_time exists.

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 tool has zero parameters, so the description does not need to explain parameter meanings. However, the input schema with additionalProperties: true is open-ended, and the description provides no clarification that the tool takes no meaningful arguments; still, per the zero-parameter baseline this is acceptable.

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 restates the tool name almost verbatim ('set start time') and only adds the generic 'Premiere Pro expanded operation' prefix. It never specifies whether the start time applies to a clip, sequence, marker, or playhead, so an agent cannot tell this apart from sibling tools like set_clip_start_time or set_zero_point.

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?

There is no guidance about when to use this tool, which object it applies to, or when to prefer an alternative. With over a hundred sibling tools, including set_clip_start_time and set_playhead_position, the complete absence of usage context leaves the agent to guess.

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