join_dev_game

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

Without annotations, the description discloses key behavioral traits: mutation, dev-only shortcut, bypass of ready-up flow, requirement for specific state, and return values (room_id, assigned slot). Missing details on possible errors or limits, but adequate for a simple 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?

Three sentences, each earning its place: first sentence states mutating behavior and purpose, second states prerequisite, third states return and production alternative. Front-loaded with key keywords for quick agent scanning.

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?

While the description covers purpose, usage, and behavior well, it omits explanation of the input parameter `connection_id`. For a tool with one parameter and no output schema, this gap reduces completeness. The prerequisite mentions state but doesn't clarify the parameter's role.

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 has one parameter `connection_id` with 0% coverage in description. The description provides no explanation of what connection_id is or how to obtain it. With low schema coverage, the description must compensate but fails entirely, leaving the agent uninformed about the sole required input.

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 verb 'join' and resource 'dev game', specifying it's a development-only shortcut that joins the first available room as red player and starts the match. It distinguishes from sibling tools like join_room by highlighting the bypass of normal ready-up flow and production use case.

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?

Provides explicit usage context: development-only shortcut with prerequisite (state=in_lobby, call set_player_metadata first). Also gives clear alternative for production: use join_room + set_ready instead. This helps the agent decide when to invoke this tool vs alternatives.

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