render_animation

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

There are no annotations, so the description carries the burden. It discloses that the operation is long-running, which is a useful behavioral warning. However, it does not explain output handling, whether it blocks, or if it modifies any files, leaving gaps in understanding side effects.

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?

Two short, front-loaded sentences immediately state the purpose and a critical caveat. No filler or redundancy.

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 no parameters and a clear scope, but the description omits details about how the render is configured (e.g., using current render settings, output path) and whether it writes files. The long-running warning is helpful, but the agent may need more context to fully anticipate side effects.

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 zero parameters, which deserves a baseline of 4. The description correctly says there is nothing to configure, and no parameter documentation is needed.

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 the specific verb 'Render' with the resource 'animation' and clearly specifies the full frame range, distinguishing it from single-frame or viewport rendering seen in sibling tools like render_image and render_viewport. The scope is unambiguous.

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 implicitly indicates this tool is for rendering the entire animation sequence, not a single frame or viewport, but it does not explicitly state when to use it vs alternatives like render_image or render_viewport. The context is clear but lacks explicit exclusions or alternative references.

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