request_to_join_community

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

With no annotations provided, the description carries the full burden of disclosing behavioral traits. It only mentions that an answer may be required for some communities, but it does not disclose side effects, outcome of the request, reversal options, or any permission requirements. This is a significant gap for a mutation-type tool.

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 concise and well-structured: a clear one-line purpose, a short clarifying note about policies, and an args list. Every sentence adds value with no redundancy or filler.

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?

The tool is relatively simple, and the output schema exists to describe return values. The description covers the core action and the key conditional parameter. However, it does not explicitly address how this tool relates to the sibling pick_community or what happens after a request is submitted, leaving some contextual gaps.

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 schema description coverage is 0%, so the description compensates by explaining both parameters. community_id is defined as 'The community ID to request to join,' and answer is described as optional but required for some moderator-approval communities. This adds meaningful context beyond the schema's bare property titles, though it could still clarify the format of community_id.

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 specific verb and resource: 'Request to join a Twitter Community.' It also distinguishes from sibling tools by noting the context of restricted join policies requiring moderator approval, which separates it from direct joining tools like join_community.

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 provides clear context by explaining that this tool is for communities with restricted join policies. However, it does not explicitly mention alternatives (e.g., using join_community for open communities) or offer exclusionary guidance, so it falls short of a 5.

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