blend-ai

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

With no annotations provided, the description carries the full burden of behavioral disclosure. While it indicates this is a creation tool ('Create'), it doesn't address important behavioral aspects like whether this requires specific permissions, what happens if a material with the same name exists, whether changes are reversible, or any rate limits. The description provides minimal behavioral context beyond the basic creation action.

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 well-structured with a clear opening statement followed by organized parameter documentation. While efficient, the 'Returns' section is somewhat redundant since an output schema exists. Every sentence serves a purpose, though the structure could be slightly more front-loaded.

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 the complexity (10 parameters, creation operation) and the presence of an output schema, the description is mostly complete. It thoroughly documents all parameters and their semantics. The main gap is insufficient behavioral context for a creation tool with no annotations, though the output schema reduces the need to explain return values.

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?

With 0% schema description coverage and 10 parameters, the description provides comprehensive parameter documentation that fully compensates for the schema gap. Each parameter is clearly explained with its purpose, data type, valid ranges, and default values, adding significant value beyond what the bare schema provides.

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 specific action ('Create a fully configured Principled BSDF material') and resource ('material'), distinguishing it from sibling tools like 'create_material' by specifying the exact material type (Principled BSDF). The phrase 'in one call' adds useful context about the tool's comprehensive nature.

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 usage when a fully configured Principled BSDF material is needed, but doesn't explicitly state when to use this versus alternatives like 'create_material' or 'set_material_property'. No guidance is provided about prerequisites, dependencies, or when not to use this tool.

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