insert_keyframe

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

No annotations are provided, so the description carries the full burden. It explains that a keyframe is inserted, and that an optional value can be set first, but does not mention side effects (e.g., overwriting existing keyframes) or requirements (e.g., existing animation data).

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 well-structured with a summary line, followed by a bulleted list of arguments and a return description. Every sentence adds value, and it is appropriately concise with no wasted words.

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 covers purpose, parameters, and return value. It has an output schema, so return details are documented. However, it lacks edge-case behavior (e.g., error handling for invalid data_path) and setup requirements, but given the tool's simplicity, it is still complete enough.

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 input schema has 0% description coverage, but the description adds detailed meaning for all parameters: object_name, data_path with valid values list and indexed variants, frame as integer, and value as optional. This significantly enhances understanding beyond the schema.

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 action (Insert), resource (keyframe), and context (on an object property at a specific frame). It distinguishes the tool from siblings like 'delete_keyframe' and 'list_keyframes'.

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 parameter constraints (e.g., valid data_path values) but does not explicitly state when to use this tool versus alternatives like 'set_interpolation' or 'clear_animation'. No guidance on prerequisites or when not to use.

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