generate_sprite_shadow

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 does mention 'deterministic' and 'clipped', which are useful behavioral traits, but it fails to disclose the side effect of writing an output file (via output_filename), any required permissions, or whether the operation is read-only or destructive. For a tool that creates a file, this is a significant gap.

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, efficient sentence with no fluff. It front-loads the core action and key qualifiers. There is no redundancy or unnecessary detail, so it earns top marks for conciseness.

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?

Given seven parameters (five required), no output schema, and no annotations, this description is severely under-specified. It does not explain what the parameters do, what the output looks like, how 'clipped' is defined, or any edge cases. An agent would have to guess at most of the input semantics, making the tool nearly impossible to use correctly without external documentation.

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 schema has 0% description coverage, so the description must explain the parameters. It does not mention any of the seven parameters (input_filename, output_filename, offset_x, offset_y, color, format, opacity) by name or meaning. The only hint is 'alpha data', which is not a parameter. The description adds zero semantic value to the parameters.

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 verb ('Generate'), a specific resource ('sprite shadow'), and a defining input ('from alpha data'). It also includes two behavioral qualifiers ('deterministic', 'clipped') that help distinguish it from siblings like generate_sprite_hitboxes or generate_normal_map. However, it does not explicitly state the output format or scope limitations, so it's not as explicit as the best examples.

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?

There is no guidance on when to use this tool versus alternatives. It does not mention any sibling tools, prerequisites, or conditions that would select this over others like generate_sprite_anchors or generate_sprite_hitboxes. The description is purely declarative with no contextual routing.

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