set_texture

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

No annotations are provided, so the description carries the full burden. It tells us it mutates an object by applying a texture and returns a simple success/failure message. However, it doesn't disclose important behavioral traits like whether the operation is undoable, whether it overwrites existing materials, or what failure conditions exist. It doesn't contradict annotations, but it's a minimal description for a mutation tool.

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 brief, with a clear one-sentence summary, a short parameter list, and a note about the return value. Every sentence earns its place without extraneous words.

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 straightforward apply operation, the description is mostly complete. It explains the prerequisite (texture downloaded), the parameters, and a brief note on the return value. However, it lacks details on edge cases and the 'user_prompt' parameter remains unexplained. It's adequate but leaves some gaps for a tool with three parameters and no annotations.

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%, but the description does explain both parameters in the text. It adds meaning beyond the schema by stating that texture_id is a Polyhaven texture and that it must be downloaded first. However, it fails to explain the third parameter, 'user_prompt', which is in the schema but not mentioned in the description. This omission is a gap.

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 uses a specific verb+resource: 'Apply a previously downloaded Polyhaven texture to an object.' It clearly indicates the action (apply), the resource (Polyhaven texture), and the target (an object). This is unambiguous and distinguishes it from the many sibling tools, which deal with searching, downloading, or generating models.

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 specifies 'previously downloaded' and 'must be downloaded first', giving clear context that the texture must already be downloaded. It doesn't explicitly mention alternatives, but the sibling list shows many related tools. It also doesn't state when NOT to use this tool, though the exclusion is logically implied by the download-first requirement. The description clearly explains the context but omits an explicit alternative.

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