Create Directory

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

Annotations already indicate idempotentHint=true (repeated calls are safe), destructiveHint=false (non-destructive), and readOnlyHint=false (modification). The description adds that parent directories are created if missing, which is useful beyond annotations. No contradictions, but more behavioral context (e.g., error behavior) would be helpful.

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?

Extremely concise: two lines of description plus structured Args/Returns. Front-loaded key information. Every sentence earns its place.

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 (1 param, no output schema), the description covers the essential: creation with parent directories. However, could mention what happens on conflict (e.g., existing directory) or return value format. Still adequate for a straightforward 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?

Schema coverage is 100%, so the description adds little beyond what the schema provides. The description mentions 'path' but no extra details on formatting or allowed characters. Baseline 3 is appropriate.

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 'Creates a new directory (including parent directories)'. The verb 'Creates' and resource 'directory' are specific. It distinguishes from siblings like 'fc_delete_directory' and 'fc_list_directory' by its creation purpose.

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. While it's clear for basic creation, the description doesn't mention prerequisites (e.g., permissions, existing parent) or warn against misuse. No mention of when not to use.

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