create_directory

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

Annotations already indicate idempotency and non-destructiveness. The description adds only the operation and a confirmation-message return, but does not disclose behavior if the directory already exists, whether nested parents are created, or required permissions.

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 compact and well-structured: a one-line purpose, an Args section with an example, and a Returns section. There is no unnecessary filler or repetition.

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 one-parameter tool with an output schema and safety annotations, this is minimally adequate. However, it omits important operational details such as existing-directory behavior, nested path creation, and whether the path is relative to a specific root.

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 provides only the parameter name 'path' with 0% description coverage, so the description carries the burden. It clarifies the parameter as 'Directory path to create' and gives a concrete example, which is meaningful. It stops short of explaining path rooting or parent-directory behavior.

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 states a specific action and target: 'Create a new directory in Nextcloud.' This is clear and distinct from sibling file-related tools, though it does not explicitly call out an alternative.

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 gives no guidance on when to use this tool versus related operations like list_directory, move_file, or upload_file. There are no conditions, exclusions, or alternative tool mentions.

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