create_sprite

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

With no annotations, the description carries the full behavioral burden. It usefully discloses import-specific behavior such as auto-downscaling pixel art, pixelating when `width`/`height` are combined with `from`, and editing the imported file rather than the original. However, it omits key mutation behavior such as what `overwrite` does when the path already exists and how `palette`/`colorMode` affect the created sprite.

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 short and front-loaded, with no wasted filler. However, the brevity comes at the cost of clarity: "New sprite file" is a fragment, and important behaviors are compressed into a dense semicolon-separated sentence.

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?

For a 9-parameter mutation tool with no annotations and no output schema, the description is incomplete. It covers import-specific behavior but does not explain path semantics, overwrite behavior, palette/colorMode effects, failure cases, or what the agent should expect after creation.

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 only 33%, so the description needs to compensate. It explains some semantics for `from`, `width`, `height`, and auto-downscaling, but leaves `path`, `colorMode`, `overwrite`, and most of `palette` and `background` without added meaning beyond the sparse 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 first sentence, "New sprite file," only restates the tool name rather than stating a clear verb and resource. The follow-up adds that it can import an image via `from`, so the purpose is inferable, but it doesn't explicitly distinguish this from siblings like `ingest`, `generate`, or `draw`.

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 says "Or import an image with `from`," which implies one usage mode, but it gives no guidance on when to create a blank sprite versus importing versus using `ingest` or `generate`. No prerequisites, exclusions, or alternative tools are named.

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