vibekit_write_file

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

With no annotations provided, the description carries the full burden. It states the core mutation ('Write or update a file') but does not disclose other behavioral traits such as whether it overwrites the entire file, creates missing directories, requires specific permissions, or whether changes trigger a deploy. This leaves significant gaps for a mutation tool.

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 two short sentences that lead with the action and purpose. Every word contributes value, with no filler or redundancy. It is appropriately sized for the tool's simplicity.

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?

The tool is simple with well-described schema parameters, but there is no output schema or annotations. The description fails to mention key contextual details like whether the file overwrite is atomic, whether the app needs to exist, or how changes take effect (e.g., immediate vs. after deploy). This leaves moderate gaps for an agent.

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 provides 100% description coverage for all three parameters, so the baseline is 3. The description adds no additional parameter-level meaning beyond what the schema already clarifies (e.g., 'Full file content to write'), so it neither improves nor hurts.

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 action ('Write or update a file'), the resource ('in an app's workspace'), and the intended use ('to edit code directly'). It distinguishes itself from siblings like read_file and list_files by emphasizing the write/update nature.

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 phrase 'Use this to edit code directly' provides clear context for when to use this tool, implying you should use it for editing code files, not just reading or listing them. It does not name explicit alternatives, but the context is clear.

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