set_poster_frame

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

No annotations are provided, and the description discloses nothing about side effects, required selections, mutability, or reversibility. The agent has zero insight into what invoking this tool will do.

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?

While the description is brief, it is under-specified rather than efficiently informative. It contains no substantive information beyond the tool name, making it a tautological placeholder.

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?

The description is completely inadequate for an agent. It fails to explain what a poster frame is, how one is set, what the prerequisite context is (e.g., a selected clip), or what the effect will be. Without any output schema or additional annotations, the agent cannot safely invoke this tool.

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, and the schema fully defines the input structure. With no parameters to explain, the description does not need to compensate, so the baseline of 4 applies.

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 'Premiere Pro expanded operation: set poster frame' simply restates the tool name with a generic prefix. It does not clarify what a poster frame is, which object it applies to, or how it differs from other 'set' tools.

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 on when to use this tool, what prerequisites exist, or how it relates to sibling tools like capture_frame or freeze_frame. The description provides no actionable usage context.

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