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, but the description adds value by specifying the action (export to STL) and implying file creation. However, it does not disclose additional behavioral traits like error handling, file overwriting, or performance considerations, leaving gaps beyond the annotations.

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, direct sentence with no wasted words, clearly front-loaded with the core action. It efficiently conveys the essential information without unnecessary elaboration.

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 (export operation with 2 parameters), lack of output schema, and annotations covering basic safety, the description is minimally adequate. It states what the tool does but lacks details on output format, error cases, or integration with sibling tools, leaving room for improvement in completeness.

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 description mentions 'a named body', which adds some context for 'body_name', but does not fully compensate for the missing schema details or explain parameter interactions, aligning with the baseline for partial coverage.

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 verb 'Export' and the resource 'a named body as an STL file', making the purpose specific and understandable. However, it does not explicitly differentiate from sibling export tools like 'export_f3d' or 'export_step', which would require mentioning format distinctions or use cases.

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 such as 'export_f3d' or 'export_step', nor does it mention prerequisites like needing an existing body. It lacks explicit context for selection among export or other sibling tools.

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