write_file

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

With no annotations, the description must disclose behavior; it mentions creating parent directories, which is a useful side-effect. However, it does not state whether existing files are overwritten, nor any other safety or error behavior.

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 sentence that is direct and front-loaded, with no filler. It communicates the action, target, and a key side-effect efficiently.

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 write tool with two parameters and no output schema, the description covers the core purpose and one behavioral detail. It is adequate but not exhaustive—missing overwrite semantics and usage alternatives, though these are lower priority for such a 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?

Both parameters are fully described in the schema, and the description's phrase 'text file' aligns with content being a string. The description adds no additional parameter-level semantics beyond the schema, so the baseline for high coverage is appropriate.

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 a text file to the working directory, using a specific verb and resource. It also notes the parent-directory creation behavior, which distinguishes it from other write tools like write_score.

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 usage—writing text files to the working directory—but does not explicitly compare with sibling tools or provide when-not/exclusion guidance. It is clear enough for basic selection but lacks explicit alternative guidance.

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