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

The annotations already declare this is a non-read-only, non-idempotent, non-destructive, closed-world write. The description adds genuinely new context: the project is 'persistent,' 'clean,' and shared across the /editor UI, the Editor agent, and the HyperFrames renderer. However, it doesn't warn that repeated calls create duplicate projects (consistent with idempotentHint=false), nor what identifier is returned.

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 tight sentences with no filler, and the core action is front-loaded before the downstream-consumer context. The second sentence earns its place by clarifying persistence and where the project surfaces, though it could be trimmed slightly.

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 simple one-parameter creation tool with no output schema, the description conveys what is created and where it appears, which helps the agent locate it afterwards. It omits what is returned (e.g., a project ID needed by render_editor_project or get_editor_project) and whether 'name' is optional, leaving a gap an agent would likely hit immediately.

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?

There is a single parameter with 100% schema description coverage, so the schema already documents 'name.' The description says nothing about the name parameter (e.g., defaults, uniqueness, whether it can be omitted given zero required parameters), so baseline 3 applies.

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?

States a specific verb (Create) and resource (Editor Project), and adds scope with 'clean, persistent project in your real Switch Editor,' which distinguishes it from get_editor_project and list_editor_projects. It stops short of explicitly naming those siblings as alternatives, but the action is unambiguous.

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?

There is no when-to-use or when-not-to-use guidance and no mention of prerequisites, such as whether a project must exist before uploading media or rendering. The sentence about the /editor UI and renderer implies a workflow role but never states the condition that should trigger this tool over its siblings.

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