delete_folder

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

Discloses irreversibility and IMAP protocol, but does not mention error handling or side effects like cache invalidation. Without annotations, the description carries the burden but covers key behavioral traits.

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?

Two sentences with no wasted words; first sentence states action, second provides constraints and consequences.

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?

Covers prerequisites, restrictions, and irreversibility for a simple one-param tool without output schema. Could mention return status but not critical.

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?

Adds context to the 'path' parameter by specifying it is an IMAP folder path and imposing constraints (cannot be system folders), going beyond the schema's description.

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?

Clearly states it deletes an empty mailbox folder via IMAP, specifying the verb and resource, and distinguishes from siblings like create_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?

Explicitly states prerequisites (folder must be empty), warns against deleting system folders, and implies alternatives (move or trash messages first).

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