add_animation

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

No annotations are provided, and the description does not disclose side effects, prerequisites, or mutation behavior. It does not state whether an existing animation is overwritten, whether the library path must be valid, or what happens on failure—leaving the agent without safety or expectation information.

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 a single short sentence, which is under-specified rather than appropriately concise. It omits essential context needed for correct use, so its brevity is a deficiency rather than a strength.

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?

With three required parameters, no annotations, no output schema, and related sibling tools, the description provides far too little information. It does not explain what constitutes a valid library, how length is measured, the return value, or error conditions, making the tool unusable without additional research.

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 explain any of the three parameters (name, length, library_path). It says nothing about units for length, what library_path refers to, or required formats, so it fails to compensate for the schema's lack of detail.

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 uses a specific verb ('Add') and identifies the resource ('an animation to a library'), making the core operation clear. However, it does not explicitly differentiate from sibling tools like add_track or create_animation_library, though the action itself is distinct enough.

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 provides no guidance on when to use this tool versus alternatives, such as whether the library must already exist (via create_animation_library) or how this relates to add_track and set_keyframe. No preconditions or use cases are mentioned.

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