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

The annotations already establish that this is a non-destructive write operation, and the description adds that the call may return a needs_confirmation envelope. It does not explain the successful return shape or duplicate-name behavior, but the added confirmation warning is meaningful behavioral context beyond the annotations.

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 purpose is front-loaded in the first sentence, followed by context, a duplicate-check warning, and the confirmation caveat. The second sentence about what folders gather is slightly explanatory but still earns its place by clarifying the resource's role.

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 creation tool, the schema is complete and the annotations cover the safety profile. The description adds the important duplicate-check prerequisite and the possibility of needs_confirmation, though it does not describe the successful result.

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 100%, so all four parameters are already documented in the input schema. The description only implies the parent/child placement and folder name, adding little beyond the schema's own explanations.

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 gives a specific verb and resource: it makes a folder in Home, either at the top level or inside another folder. It is clear what the tool does, but it does not explicitly distinguish creation from sibling operations such as workspace_folders_update.

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?

It tells the agent to check workspace_folders_browse first to avoid creating a duplicate folder, which is a useful prerequisite. It does not state what to do if a matching folder already exists, such as using an update tool instead.

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