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

No annotations are provided, so the description carries the burden of disclosing behavior. 'List' implies a read-only operation and the description states it returns all boards and sub-boards. It does not mention authentication, pagination, or error behavior, but for a zero-parameter discovery endpoint this is a minor 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 two short sentences with no filler. The core action and resource are front-loaded, and the usage guidance follows naturally without repetition.

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 has no parameters, no output schema, and a straightforward read-only purpose, the description is complete for ensuring correct invocation. It could mention the return format explicitly, but 'board names' is already implied by 'discover board names.'

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?

There are zero parameters, and the schema is empty, so the baseline is 4 per guidelines. The description adds contextual meaning (Traditional Chinese forum, board discovery) that complements the empty 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 uses a specific verb ('List') and clear resource ('all boards and sub-boards' in a zh-TW Taiwan forum). It also states the intended outcome ('discover board names'), which distinguishes it from siblings like list_articles and search_forum.

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 explicitly instructs to call this tool first before 'listing articles by board,' giving clear temporal guidance. It does not explicitly name alternatives or exclusions, but the 'call this first' directive effectively routes an agent to the correct workflow.

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