ui_init

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

With no annotations, the description carries full burden. It explains the write behavior, including what happens when overwrite is false (leaves existing file untouched) and true (clobbers). It describes reading project files and the return format. However, it could mention that it reads files non-destructively.

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 with a concise summary, a paragraph explaining the purpose, then explicit Args and Returns sections. Every sentence adds value and there is no waste.

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 has an output schema but the description already lists return fields, it is fairly complete. It covers purpose, parameters, and return. It could mention potential prerequisites (e.g., existence of package.json), but not necessary for a setup tool.

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%, so description compensates fully. For project_dir, it says 'Path to the project root to scan and write into.' For overwrite, it explains the behavior in detail, including the status returned when not overwriting. This adds significant meaning beyond 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 description clearly states the tool auto-detects the stack and writes a config file, with specific actions like inspecting manifests and guessing framework. It distinguishes itself from sibling tools (ui_implement, ui_review) by noting that after this tool, the others run with no further setup.

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 says it's a 'zero-to-config helper for non-technical users' and implies usage before ui_implement/ui_review. It doesn't explicitly state when not to use it, but the context makes it clear that it's for initial setup. An explicit 'when not to use' would improve it.

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