kling_talking_photo

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. It mentions the output is a video with synchronized lips/expressions/head movements and returns a Task ID, hinting at asynchronous operation. However, it does not detail the asynchronous workflow, potential failure modes, or any prerequisites beyond providing image and audio URLs.

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 concise and well-structured: a clear one-sentence summary, a 'Use this when' list with three bullet points, and a 'Returns' line. Every sentence adds value, and the information is front-loaded.

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 the output schema exists and the input schema is fully documented, the description provides sufficient context for the tool's core function. It could be improved by explicitly stating the async task workflow (e.g., use kling_get_task to fetch results), but the 'Returns Task ID' line partially covers this.

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 description coverage is 100%, so the baseline is 3. The description does not add any parameter-specific semantics beyond what the schema already provides, which is acceptable since the schema thoroughly documents all seven 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 the tool animates a portrait photo to match an audio track, generating a talking-head video. It uses specific verbs ('Animate', 'generates') and describes the resource (portrait photo + audio). This distinguishes it from generic video generation 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?

The 'Use this when' section provides explicit use cases: creating talking-head videos, making a person speak, and quick avatar videos. It does not explicitly name alternatives or exclusion criteria, but the context is clear enough for an agent to decide when to invoke this tool.

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