blender_animation_play

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

With no annotations provided, the description carries the full behavioral disclosure burden, but it only restates the basic toggle action. It does not disclose what happens when the optional 'play' parameter is omitted, whether playback blocks execution, whether it affects only the viewport/timeline, or whether calling play=true while already playing is idempotent.

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 six-word sentence with zero waste and the verb front-loaded. For a one-parameter boolean toggle, this length is appropriately sized, and every word earns its place.

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 low complexity (one optional boolean, no output schema, no nested objects), so the description is mostly adequate. However, because there are no annotations and no output schema, the description is the only source of behavioral context, and it leaves the omitted-parameter behavior and the playback scope (viewport vs. timeline) unstated.

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 100% and the parameter description ('True to play, false to pause') is self-explanatory, so the baseline of 3 applies. The tool description essentially echoes the parameter semantics without adding extra meaning, and the optionality with no declared default remains slightly ambiguous.

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 pair ('Play or pause') with a clear resource ('animation playback'), making the action unmistakable. It is implicitly distinguished from siblings like blender_animation_goto_frame (seeking) and blender_render_animation (rendering to output), though it doesn't explicitly name those alternatives.

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 given about when to use this tool versus alternatives such as blender_animation_goto_frame or blender_render_animation. There is no mention of whether this is for viewport preview, how it relates to scrubbing frames, or any prerequisite scene state, so an agent must infer all usage context.

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