make_directory

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

The only behavioral hint is 'This modifies the computer,' which is vague and does not disclose specifics like side effects on existing directories, default creation of parents, or error behavior. With no annotations, the description fails to provide sufficient transparency.

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 extremely short and front-loaded with the purpose. However, the second sentence 'This modifies the computer' adds little value and could be omitted, making it less tight than a perfect score.

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?

The tool has three parameters, one required, and the description is minimal. It does not cover parameter semantics, default behaviors, or potential errors, making it incomplete for safe and correct usage despite an output schema being present.

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 0%, and the description does not mention any parameters. It provides no explanation of what 'path', 'parents', or 'exist_ok' do, leaving the agent to rely solely on parameter names.

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?

Description uses a specific verb and resource: 'Create a directory.' This clearly distinguishes it from sibling tools like write_text_file or copy_path. The purpose is unambiguous.

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 given on when to use this tool versus alternatives, nor on how the parameters (parents, exist_ok) affect behavior. Lacks any context about prerequisites or exclusion criteria.

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