set_texture

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

With no annotations, the description carries the full burden of disclosure. It only mentions 'Returns a message indicating success or failure' but does not disclose that the tool modifies the object's material, whether it replaces existing textures, or any error conditions. This is insufficient 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 concise, with a clear action sentence, a structured parameter list, and a return message. Every sentence serves a purpose with no redundancy or fluff.

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 simple 2-parameter tool with no output schema, the description covers purpose, parameters, and return message. It clearly implies the dependency on downloading, but does not detail error scenarios or side effects beyond success/failure, leaving a minor gap.

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 provides no descriptions (0% coverage), so the description adds meaning for both parameters. object_name is defined as 'Name of the object to apply the texture to' and texture_id as 'ID of the Polyhaven texture to apply (must be downloaded first)'. This effectively compensates for the schema 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 clearly states 'Apply a previously downloaded Polyhaven texture to an object', using a specific verb and resource. It distinguishes itself from sibling tools like download_polyhaven_asset by focusing on applying rather than downloading.

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 phrase 'previously downloaded' provides clear context that a download must precede use, implying the dependency on download_polyhaven_asset. However, it does not explicitly name alternative tools or state when not to use the tool.

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