create_countdown_video

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

With no annotations, the description carries the full burden of behavioral disclosure, but 'Create a countdown animation' essentially restates the tool name. It does not explain how the countdown behaves, what defaults apply, what output is produced, or whether the result is composable with other edits.

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 only one sentence with no filler, but it is under-specified rather than genuinely concise. It mostly mirrors the tool name and provides almost no operational 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?

The tool has four optional parameters, no output schema, and no annotations. A complete description would clarify countdown semantics, the meaning of the background parameter, and output expectations. None of this is present, making the definition inadequate for reliable autonomous invocation.

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 0%, and the description does not mention any of the four parameters: width, height, seconds, or background. The agent receives no explanation of what these values mean or how defaults behave.

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 names a specific resource, 'countdown animation', with the verb 'Create', so an agent can tell the intended result. It does not explicitly differentiate it from sibling animation tools like create_custom_animation or create_animated_scene, which weakens distinction slightly.

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 provided about when to use this tool versus the many sibling animation and video-creation tools. There are no prerequisites, examples, or exclusionary conditions, so the agent must infer usage from the tool name alone.

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