create_thicken

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

No annotations are present, so the description carries the full burden of disclosing side effects and behavior. It only says 'create,' implying a document-mutating operation, but does not state that a feature is added to a Part Studio, whether the operation is reversible, how operationType affects the geometry, or how failures manifest. This is a significant transparency gap 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 one-sentence description is terse, front-loaded, and free of filler, which makes the core purpose immediately clear. It is appropriately concise for a basic statement of intent, though the saved space could have been used for usage or behavioral guidance. Overall, the structure is efficient rather than bloated.

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?

Despite having 10 parameters, no annotations, and no output schema, the description provides only the core purpose. It omits when-to-use guidance, expected results, and relationships to alternatives such as create_extrude or create_shell. This is not complete enough for an agent to confidently invoke the tool in a complex CAD context.

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 100%, and every parameter already has a meaningful description, including units for thickness, the operationType enum, and boolean behaviors. The description adds almost no parameter-level meaning beyond confirming the sketch as the feature source. Baseline 3 is appropriate because the schema carries the semantic load.

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 and resource ('create a thicken feature') and identifies the input ('from a sketch'), making the tool's function unambiguous. This differentiates it from sibling creation tools like create_extrude or create_revolve without requiring schema inspection. It is not merely a restatement of the tool name.

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 gives no guidance on when to use this tool versus alternatives. It does not state prerequisites, such as needing a valid closed sketch, nor does it mention scenarios where another feature-creation tool would be more appropriate. An agent must infer usage entirely from the tool name and schema.

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