operations_mkdir

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

With no annotations, the description carries the full burden. It discloses an important behavior (idempotence via "if it does not exist"), but it does not mention whether parent directories are created, what happens on errors, or detail the response/return value. This is a moderate level of transparency for a simple create operation.

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 short and front-loaded, with the main action stated first. The phrase "Create directory" is somewhat redundant with the tool name, but the clarifying clause adds value. Overall it is efficient with no unnecessary filler.

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 tool's simplicity and full schema coverage, the description provides a basic understanding of the action. However, it omits key context such as whether parent directories are created automatically and what happens if the target already exists (the "if it does not exist" hints at idempotence but does not fully clarify error behavior). This leaves some gaps for a no-annotation, no-output-schema 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?

The schema already describes all four parameters with 100% coverage, so the baseline is 3. The description adds no supplementary meaning about the parameters; it only paraphrases the concept of a target directory, which is already captured by the schema.

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 verb (create) and resource (directory/container), and the idempotent condition "if it does not exist" adds precision. It is distinctly different from sibling tools like operations_copyfile or operations_deletefile, so 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?

The description implies usage (to create a directory), but it does not explicitly state when to use this tool versus alternatives or provide any exclusions. Sibling tools are all different operations, so no conflict is present, but no guidance is given beyond the obvious purpose.

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