Fusion360 MCP Server

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

Annotations indicate this is a non-read-only, non-idempotent, non-destructive operation, which the description aligns with by implying a file creation action. However, the description adds minimal behavioral context beyond this—it doesn't specify if the export overwrites existing files, requires specific permissions, or has rate limits, leaving gaps in understanding the tool's behavior.

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 a single, clear sentence with no wasted words, making it easy to parse and understand quickly. It's front-loaded with the core action and resource, which is ideal for efficient comprehension.

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 tool's moderate complexity (2 parameters, no output schema) and annotations covering basic safety, the description is minimally adequate. It states the purpose but lacks details on usage, behavioral nuances, or parameter specifics, making it incomplete for fully informed tool selection and invocation.

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 50%, with 'file_path' documented but 'body_name' lacking a description. The tool description mentions 'a body or component' which clarifies the semantics of 'body_name' slightly, but it doesn't provide details on format, constraints, or examples. This adds some value but doesn't fully compensate for the schema's gaps.

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 action ('Export') and the target resource ('a body or component as a STEP file'), making the purpose immediately understandable. It distinguishes itself from other export tools like 'export_f3d' and 'export_stl' by specifying the STEP format, though it doesn't explicitly contrast with those siblings.

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 no guidance on when to use this tool versus alternatives like 'export_f3d' or 'export_stl', nor does it mention prerequisites or context for exporting STEP files. It simply states what the tool does without indicating appropriate scenarios or exclusions.

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