create_folder

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

Annotations already provide safety profile (non-destructive, non-idempotent). The description adds 'subscribe' behavior, which is helpful but not extensive. No contradictions.

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?

Single sentence is concise and front-loaded. No unnecessary words, but could include a brief note on parameters without harming conciseness.

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 with output schema present, the description is fairly complete. Basic parameter info and return value explanation would improve it further.

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 0% with no enum descriptions. The description does not elaborate on the 'folder' or 'account' parameters beyond their names, missing an opportunity to compensate.

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 explicitly states 'Create a new IMAP folder and subscribe to it,' with a clear verb and resource. It distinguishes from sibling tools like delete_folder or rename_folder.

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 when to use (creating IMAP folders), but provides no explicit guidance on when not to use or alternatives. Context from sibling tools is absent.

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