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

The description adds useful behavioral details: audio from each clip with no external audio bed, and that it returns a queued creation (async operation). It also implies a prerequisite (completed creations). No contradiction with annotations exists.

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 extremely concise, two sentences, with the core purpose front-loaded. No filler or redundant 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 no output schema, the description clarifies the return type ('queued creation') and adds audio handling details. However, it lacks elaboration on parameter usage and any potential side effects beyond concatenation. It is adequate but leaves gaps for an agent to interpret.

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% and the description only implicitly covers creationIdentifiers (the videos to concatenate). It does not explain the meaning of 'name' or 'folderReference'. The description fails to compensate for the lack of schema documentation on two of three parameters.

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 clearly states it concatenates completed video creations into one MP4, distinguishing it from other video tools like generate or plan. The mention of video_plan ties it to that workflow.

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 it is used to assemble multi-clip plans from video_plan, but does not explicitly state when to use it versus alternatives, nor when not to use it. It provides context but no exclusions or explicit alternatives.

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