build_sprite_runtime_bundle

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It does disclose one useful trait, 'deterministic', and indicates the bundle contains three artifacts, but it does not state whether files are written or overwritten, whether this is a pure build vs. an in-place mutation, or what side effects may occur. For a build/mutation-style tool without annotations, 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, tight sentence that front-loads the core purpose and key output contents. It contains no filler or redundant restatement of the tool name, making it both concise and useful.

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 the high parameter count (10), five required parameters, no annotations, and no output schema, this short description is not complete enough. An agent can grasp the high-level purpose, but cannot confidently determine how the required filenames map to inputs/outputs, how optional parameters affect the result, or what the tool returns. More operational context is needed.

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 0%, and the description adds very little about the 10 parameters. It does suggest that filenames relate to the animation sheet, timing manifest, and hitbox manifest, but it does not explain input_filename, columns, hitbox_mode, sheet_padding, hitbox_padding, or min_component_pixels. Parameter names are somewhat self-explanatory, but the description itself does not compensate for the missing schema documentation.

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 names a specific verb ('Build') and a specific resource ('deterministic runtime bundle'), and clarifies the bundle's contents: animation sheet, timing manifest, and sprite hitbox manifest. It distinguishes itself from similar build/export tools like build_scene_bundle or export_spritesheet through the 'runtime bundle' framing, though it does not explicitly name sibling 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?

The description gives no guidance on when to use this tool versus alternatives like build_animation_sheet, build_scene_bundle, or export_spritesheet. There is no mention of prerequisites, intended use cases, or exclusions, leaving the agent to infer applicability from the tool name and general phrasing.

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