set_uv_projection

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

No annotations are provided, so the description carries the full behavioral burden. It implies a mutation but never states whether existing UV data is overwritten, whether the object must be selected/active, or what constraints apply. It does at least disclose the return shape ('Confirmation dict with object name and projection type'), which is a small positive.

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?

Compact, front-loaded, and free of filler. The Args/Returns structure is easy to scan, though restating the enum values from the schema is slightly redundant.

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 mutation tool with no annotations, the description omits essential context: whether UVs are replaced, object preconditions, and how it differs from the other UV tools. The output schema covers return values and the description summarizes them, so that part is fine, but the behavioral gaps leave an agent under-informed.

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%, so the description must compensate. It restates both parameters meaningfully ('Name of the mesh object', projection type list) but adds no practical detail beyond the schema's own enum — no format for object name, no note that projection only applies to mesh objects. Marginal but non-zero value.

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?

States a specific verb and resource: 'Apply a projection-based UV mapping to a mesh object.' The 'projection-based' qualifier loosely distinguishes it from siblings like uv_unwrap and smart_uv_project, but it never names or contrasts them explicitly, so an agent must infer the boundary.

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 when-to-use guidance at all. With siblings such as smart_uv_project, uv_unwrap, and pack_uv_islands in the same family, the description should say when projection mapping is preferred (e.g., hard-surface/mechanical shapes) and when to pick another tool instead. Nothing here routes the agent.

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