Create directory

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

The description adds a key behavioral detail: missing parent directories are also created. However, no annotations exist, so the description carries the full burden. It does not disclose behavior for existing directories, error handling, or permission requirements, leaving gaps.

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, well-structured sentence. It is front-loaded with the action and immediately provides a crucial nuance ('and any missing parents'), earning its place without excess.

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 low-complexity tool with one parameter and no output schema, the description is mostly sufficient. It states the action and the main side-effect (parent creation). However, it omits behavior for existing directories and lacks reference to related tools like list_allowed_directories, which could be useful in a broader context.

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?

Although the schema covers the path parameter (100% coverage), the description enriches its meaning by stating that missing parents are created. This implies the path can be nested and is not limited to a leaf directory, which the generic schema description does not convey.

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?

Clearly states it creates a folder inside the file store, with a specific verb ('creates') and resource ('folder'). Distinguishes from sibling file operations by targeting directories and noting the recursive parent creation behavior.

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 explicit guidance on when to use this tool versus alternatives like write_file or delete_file. It provides a general idea (create a directory) but lacks conditions, prerequisites (e.g., checking allowed directories), or exclusions.

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