download_pbr_material

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

The description says it downloads and unpacks files, which is a write operation, but annotations declare readOnlyHint=true. This is a direct contradiction, severely compromising transparency.

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 fairly concise with 4 sentences that front-load the main action. It includes usage guidance for Unity/Blender, which is helpful but slightly verbose.

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?

While the description covers core functionality and provides examples, the contradiction with annotations and lack of explanation for dest_dir reduce completeness. No output schema or error handling mentioned.

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 explains asset_id and resolution with examples, adding value beyond the schema, but fails to describe dest_dir.

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 downloads a CC0-PBR set from ambientCG and unpacks specific maps, with examples of asset_id and resolution. It distinguishes from siblings by specifying the source (ambientCG vs. Polyhaven).

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 provides examples of asset_id and resolution and suggests use in Unity or Blender, but does not explicitly state when to use this tool over siblings like download_polyhaven_texture or search_pbr_materials.

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