set_cube_uv

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

No annotations are provided, so the description must fully convey behavioral traits. It discloses that the tool modifies UV mapping and texture but omits details about whether it overwrites existing values, requires existing cube, or has side effects. For a mutation tool without annotations, this is insufficient.

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, concise sentence that front-loads the verb and resource. It contains no filler and every word is meaningful.

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 no output schema and nested parameters, the description is minimal. It states what the tool does but not how it behaves (e.g., overwrite behavior, error conditions). Adequate for a simple tool but lacks completeness for safe agent invocation.

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 input schema has 100% coverage, describing both parameters in detail, including the nested structure for faces. The description echoes 'per-face texture' but adds no new meaning beyond the schema. Baseline 3 is appropriate.

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 clearly states the tool sets UV mapping and/or per-face texture on a cube's faces. It uses a specific verb 'set' and specific resources 'UV mapping' and 'per-face texture', distinguishing it from sibling tools like 'paint_faces' or 'pack_uv' which handle different texture operations.

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 implies when to use (when needing to set UV mapping or per-face texture on a cube) but provides no explicit guidance on when not to use it or alternatives. Sibling tools like 'paint_faces' or 'pack_uv' are not mentioned, leaving the agent to infer context.

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