sandbox_file_mkdir

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

No annotations are provided, so the description carries the burden. It mentions creation of parent directories, which is a behavioral detail. However, it does not disclose whether the operation is idempotent, what happens if the directory already exists, or if any permissions are needed. It adds some value but lacks depth.

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 a single concise sentence that front-loads the core action. However, it could include a brief note on behavior (e.g., idempotency) without adding much length.

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 simplicity of the tool (two parameters, no output schema), the description is minimally adequate. It does not mention edge cases like existing directories, error handling, or return value. For a straightforward creation tool, it covers the basics.

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 description coverage is 100%, so the baseline is 3. The description does not add any additional meaning beyond what the schema already provides for the two parameters (sandboxId and path). It mentions 'parent directories' but does not elaborate on path format constraints.

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 creates a directory and its parent directories in a sandbox. It includes the verb 'create' and specific resource 'directory', which distinguishes it from sibling tools like sandbox_file_write or sandbox_file_list.

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?

No guidance is provided on when to use this tool versus other file operations like sandbox_file_remove or sandbox_file_exists. There is no mention of prerequisites, such as requiring that the sandbox already exists, or when to use alternative tools.

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