Create Directory

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

Annotations provide idempotentHint=true and destructiveHint=false, and the description elaborates by explaining that nested directories can be created in one operation and that existing directories are handled silently. The constraint of allowed directories is also stated, adding transparency beyond structured data.

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 with four clear sentences. Each sentence adds unique value: core function, nested/idempotent behavior, use case, and access restriction. No redundant information.

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 tool with one parameter and an output schema, the description covers creation behavior, idempotency, nesting, and allowed-directories constraint. It is complete enough for an agent to understand when and how to invoke the 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?

With 0% schema description coverage, the description carries the full burden. It implies the path parameter supports nested creation, but does not detail format (e.g., absolute vs relative, trailing slash). The meaning is sufficient but not fully explicit.

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 directories or ensures they exist, with nested creation capability. The verb 'Create' and resource 'directory' are specific, and the scope 'Only works within allowed directories' differentiates it from siblings that operate on files or list directories.

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 provides context suggesting use for setting up directory structures or ensuring paths exist, but does not explicitly compare to alternatives or state when not to use. However, given no sibling tool duplicates this functionality, the guidance is adequate.

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