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 of behavioral disclosure. It does transparently state the destructive overwrite potential ('creates or overwrites'), but lacks context on prerequisites, side effects on parent directories, return values, or failure modes.

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 concise and front-loaded with the core action. The Args section is cleanly separated and adds necessary parameter context without excessive wording. Every sentence 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?

For a simple 2-parameter tool, the description covers purpose and parameters. However, it does not explain behavior like whether parent directories are created automatically, what happens if the path is invalid, or what the output schema contains. With an output schema present, not detailing return values is acceptable, but other operational details are missing.

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 schema has 0% description coverage, so the description must compensate. It does by providing brief explanations: path is a relative path and content is text. However, these are minimal and leave ambiguity (e.g., relative to which root, encoding, size limits).

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 writes text content to a file and explicitly mentions create/overwrite behavior. It distinguishes itself from sibling tools like read_file and delete_file with a specific verb and resource.

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 implies its use—when you need to write a file—but provides no explicit guidance on when to prefer it over alternatives or any exclusions. It does not mention when not to use this tool.

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