open_in_slicer

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

With no annotations, the description carries the full burden; it does disclose the key behavioral trait that this launches an external GUI application rather than returning data. It says nothing about what happens if the slicer is not running, whether the file must exist, or whether the call blocks until the GUI opens, leaving side-effect and failure semantics unstated.

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?

Two short sentences with no filler; the action and resource are front-loaded and the usage constraint follows immediately. Every clause earns its place.

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?

An output schema exists, so return values need no explanation, and the call itself is simple with one required parameter. Still missing for a GUI-launching side-effecting tool are preconditions (slicer installed/running, file existence) and any note on blocking behavior, which an agent needs to call it safely.

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 coverage is 0% for the single `path` parameter, so the description should compensate. It partially does by implying the path points to a model, 3MF, or G-code file, effectively constraining accepted formats, but it does not state whether the path must be absolute, a local filesystem path, or required to already exist.

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 states a specific verb ("Open") and resource set ("model/3MF/G-code") plus the target application (Anycubic Slicer Next GUI), which is distinctive. It does not name a sibling to contrast with, but the GUI-opening action is clearly separable from slice_model, preview_gcode, and model_info.

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?

"Only call this when the user asks to see it" gives an explicit positive trigger and an implicit exclusion, which is real guidance rather than none. It stops short of naming an alternative (e.g., preview_gcode for in-chat viewing), so an agent must infer which sibling to pick for other viewing intents.

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