set_source_in_out

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

With no annotations provided, the description carries the full burden of behavioral disclosure and fails entirely. It implies a state-changing operation but says nothing about whether a source clip must be open in the source monitor, what existing in/out points are overwritten, whether both points are set simultaneously, or what side effects occur. This is equivalent to the 'Process' low-severity case where the description adds no behavioral information beyond the tool name.

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 this is under-specification rather than skillful conciseness. 'Premiere Pro expanded operation' is filler that earns no value, and the remaining words merely restate the tool name. A concise definition should pack meaning into few words; this one packs almost no meaning at all.

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 no annotations, no output schema, a vague one-liner, and a sibling list full of overlapping tools, the description is severely inadequate. An agent cannot determine what source is being operated on, what input values are expected, what state is mutated, or how this differs from set_sequence_in_out_points and set_item_in_out. The tool is effectively unusable from the documented information.

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 schema declares zero parameters and the coverage is 100% vacuously, so the baseline of 4 applies per the rubric. However, additionalProperties: true is unusual and suggests arbitrary inputs may be accepted; the description is silent on what format those inputs should take (timecode, frame numbers, seconds), so it does not fully exploit the baseline advantage, but with no defined params there is little to document.

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 identifies a verb ('set') and a resource ('source in out'), which is slightly more than a pure tautology, but 'Premiere Pro expanded operation' is meaningless boilerplate. It does not define what 'source' refers to (source monitor clip, source sequence, or selected clip) and fails to distinguish this from closely related siblings such as set_sequence_in_out_points, set_item_in_out, or open_in_source.

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 given on when to use this tool versus alternatives. The sibling list contains several overlapping tools (set_sequence_in_out_points, set_item_in_out, clear_sequence_in_out, open_in_source), and the description provides no conditions, prerequisites, or exclusions to route an agent to the correct one.

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