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

No annotations are provided, so the description bears the full responsibility of disclosing behavioral traits. It only mentions 'Free' (likely cost-related) but does not disclose potential errors, permission requirements, or side effects of folder creation. For a mutation tool, this is a significant gap.

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 brief and to the point, containing only a few words. The 'Free.' addition is somewhat unnecessary but does not reduce clarity significantly. It is concise and front-loaded, though it borders on under-specification.

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 one-parameter creation tool, the description is minimally adequate but lacks details about return values, behavior if a folder with the same name already exists, or any post-creation effects. Since there is no output schema, some expectation-setting would be helpful.

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 input schema fully documents the single 'name' parameter with a description and max length, so schema coverage is 100%. The description adds no additional parameter information, so it neither improves nor detracts from what the schema already provides.

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 action ('Create') and the resource ('a folder'), which is specific and differentiates it from sibling tools like list_folders or add_videos_to_folder. However, it doesn't provide any additional context about folder types or special behaviors, so it's not a 5.

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?

There is no guidance on when to use this tool versus alternatives, no prerequisites, and no use-case examples. The description simply restates the function without any contextual direction, which is insufficient for an agent to decide when to invoke it.

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