room_join

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

With no annotations provided, the description carries full burden. It discloses that WebSocket connections form automatically to Cloudflare and describes authentication requirements for private rooms. However, it doesn't mention potential side effects, rate limits, error conditions, or what happens if joining fails.

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 well-structured with clear sections: purpose statement, authentication requirements, parameters, and returns. It's appropriately sized at 4 sentences, though the Indonesian/English mix slightly affects readability.

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 join operation with 1 parameter and an output schema, the description provides adequate context: purpose, authentication rules, parameter semantics, and return format. The output schema existence means the description doesn't need to detail return values, making this reasonably complete.

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 description adds meaningful context beyond the schema: it explains that room_id is 6 characters, token is optional for private rooms, and clarifies the public/private distinction. With 0% schema description coverage, this significantly compensates for the schema's lack of descriptions.

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 ('Join room yang sudah ada') and resource ('room'), specifying it's for existing rooms. It distinguishes from sibling 'room_create' by not creating rooms, but doesn't explicitly differentiate from other room-related tools like 'room_info' or 'room_leave'.

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 explicit guidance on when to use this tool: for joining existing rooms, with clear requirements for public vs. private rooms. It distinguishes from 'room_create' by specifying it's for existing rooms only, though doesn't mention when to use alternatives like 'room_info'.

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