Open Three.js editor

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. 'Opens the editor' is vague—it does not explain what opening entails (e.g., launching a local process, returning a URL, or requiring preconditions like a valid projectId). The behavior remains underspecified.

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?

A single, front-loaded sentence contains the essential information without any filler. Every word earns its place, and there is no ambiguity in structure.

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?

Despite its brevity, the description is largely complete for a simple tool with one parameter and an output schema that presumably covers return details. The word 'existing' implies a prerequisite, and no additional complexity requires deeper disclosure. However, it could specify what the editor opening entails or whether it modifies the project state.

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 description provides minimal context for projectId by tying it to 'an existing Three.js project,' which clarifies its role as a project identifier. However, it does not explain the format, how to obtain a valid ID, or any constraints beyond the schema pattern. Schema coverage is 0%, so this slight elaboration adds some value but not enough to fully compensate.

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 uses the specific verb 'Opens' and identifies the resource as 'the editor for an existing Three.js project.' This clearly distinguishes it from siblings like create_project or export_project by focusing on opening an editor rather than creating or exporting.

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 explicitly states the tool operates on an 'existing' project, signaling that it should not be used for new projects and implying it follows project creation. While no alternative tools are named, the context of siblings and the word 'existing' provide clear usage context.

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