import_skeletal_mesh

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

With no annotations, the description carries the full burden of behavioral disclosure, and it does a solid job: it explains skeleton reuse versus creation, details all import toggles, and provides the StructuredResult success response with animation output, warnings/errors/log fields. It does not discuss overwrite behavior or failure side effects, but the import outcome and return shape are clearly disclosed. This goes well beyond a minimal description.

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 and front-loaded with a clear purpose statement, followed by a compact parameter block and a return contract. It is somewhat long but every section earns its place. The trailing example is slightly inconsistent since file_path is documented as an OS path but the example shows a Content Browser-like path, which slightly detracts from the polish.

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 6-parameter import tool with no annotations and an output schema present, the description is largely complete: parameters, defaults, skeleton behavior, success output, and a knowledge-base reference are all included. Minor gaps remain — such as noting what happens on file-not-found, destination conflicts, or prerequisite skeleton validity checks. Overall, the agent can call the tool correctly with the information given.

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?

The input schema has zero parameter descriptions, so the description must compensate, and it does: every parameter gets a purpose and meaningful semantics, including the file_path OS-path example, destination default, skeleton reuse behavior, and boolean import toggles. The description also clarifies the subtle distinction between leaving skeleton empty to create a new skeleton versus supplying an existing Skeleton asset path. This makes the parameters actionable without needing to open the schema.

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 opening line names a specific verb and target — "Import an FBX file as a Skeletal Mesh into UE5 Content Browser." This cleanly distinguishes the tool from sibling import tools like import_static_mesh and import_animation_fbx by making the asset type explicit. The description follows through with a concrete success output showing asset_path and asset_type.

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 states what the tool does but never says when to choose this tool versus alternatives such as import_static_mesh, import_animation_fbx, or batch_import_folder. There is no exclusion guidance, prerequisite mention, or explicit conditions for picking this tool instead of a sibling. The usage context is only implied by the tool's name and top sentence.

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