erase_region

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

No annotations provided. The description discloses the action 'make transparent' but omits side effects: whether the operation is destructive, if it modifies the file in-place, how out-of-bounds regions are handled, or if the operation affects other layers. Minimal behavioral context beyond the basic functionality.

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 concise: a one-line action statement followed by a structured Args list. No redundant or ambiguous information. Every sentence adds value and is appropriately front-loaded.

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?

All 7 required parameters are explained. However, the description lacks information about return values (what the tool returns) and missing details like whether the region can exceed canvas bounds. An output schema is absent, so the description should specify the outcome. Adequate but with gaps.

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 description lists all 7 parameters with brief but meaningful explanations (e.g., 'Aseprite file to modify' for filename). The input schema only provides titles, so the description adds essential semantics. Schema description coverage was 0%, but the description fully compensates.

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 tool name 'erase_region' and description clearly state it erases (makes transparent) a rectangular region of pixels. The description specifies the resource (pixels in a sprite) and the action, distinguishing it from siblings like 'erase_color' (color-based erasing) and 'clear_cel' (clears entire cel).

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 explicit guidelines on when to use this tool vs alternatives. The description implies pixel-level editing but doesn't state prerequisites (e.g., layer must be raster) or when to choose 'erase_region' over 'fill_area' or 'clear_cel'. The hint 'Coordinates are sprite-global' provides minor context.

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