set_timeline

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. It simply says 'set', implying mutation, but does not mention whether changes are reversible, whether keyframes are affected, or any prerequisites. This is a significant gap for a mutation tool in an animation pipeline.

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 sentence with no unnecessary words. It is front-loaded and efficient, though it could add more information without becoming verbose.

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 is a simple setter, and an output schema exists (though not shown), so return values are not a gap. However, for a tool among many animation siblings, the description lacks usage context, side effects, and any indication of when it should be invoked. This makes it incomplete for an agent navigating the toolset.

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%, so the description must compensate. 'Animation range' maps to frame_start and frame_end, and 'frames per second' maps to fps, providing some semantic grounding. However, it does not explicitly explain each parameter's role or any constraints, leaving ambiguity about the exact meaning of 'range'.

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 states a clear action: setting the animation range and frames per second. This distinguishes it from siblings like set_current_frame (single frame) and keyframe tools. It could be more specific about what 'range' means, but it is unambiguous enough for selection.

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 on when to use this tool versus alternatives such as set_current_frame or insert_keyframe. The description does not mention exclusions or context, leaving the agent to infer usage from the tool name and parameters.

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