loft_sketches

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

Annotations already declare destructiveHint=true and readOnlyHint=false, so the agent knows this mutates the model; the description adds nothing about what is created, what is consumed, or irreversibility. The units note (mm, degrees, kg) is genuinely useful context not present in structured fields, but the key behavior — that the supplied sketches are consumed to build a lofted body — is never stated, and no output schema exists to fill the gap.

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?

Three short, front-loaded sentences with no padding, which is structurally sound. However, the final sentence is vague boilerplate ("Inspect verified measurements and error evidence") and its space would be better spent describing the required sketches payload.

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 destructive geometry-creation tool with an untyped required array, no parameter documentation, and no output schema, the description is far too thin. The units note partially compensates, but the essential contract — input shape and result of the loft — is missing.

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% and the required "sketches" parameter is an untyped array, so the description carries the entire burden — yet it says nothing about what each array element should contain (sketch IDs? profile loops? plane references?) or what "name" does beyond its default of "Loft". An agent cannot construct a valid call from this definition.

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 gives a specific verb plus resource ("Loft sketches") and names the execution engine, so an agent can tell it is a loft/geometry-creation operation rather than a query or export. It does not, however, distinguish itself from the close sibling add_lofted_solid or explain how lofting sketches differs from extrude_sketch/cut_sketch, so the boundary is left to inference.

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?

There is no statement of when this tool should be chosen over alternatives such as add_lofted_solid, extrude_sketch, or cut_sketch, and no prerequisites (e.g. sketches must exist, must be on distinct planes) are given. The trailing "Inspect verified measurements and error evidence" implies a verify-after-call workflow but is not when-to-use guidance.

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