github_start_device_login

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

No annotations are provided, so the description carries the full behavioral burden. It does not disclose what the tool returns, whether it starts a polling session, how long the device code remains valid, or whether any user interaction is required. For an authentication-flow initiation tool, these omissions are significant.

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 a single front-loaded sentence with no waste. It is appropriately sized for a simple no-parameter tool, though the terseness contributes to the missing behavioral detail.

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?

With no annotations and no output schema, the description would need to explain the return value and next steps for the device-code flow. It does not say whether the caller receives a user code, verification URL, or polling interval, nor does it point to a companion polling tool.

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 tool has zero parameters, so there are no parameter semantics to explain. The baseline score for a no-parameter tool is 4, and the description does not introduce any confusing parameter claims.

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 states a specific verb and resource: it starts the GitHub device-code flow. That is clear enough for an agent to know the general action. It does not, however, differentiate this tool from other authentication-related siblings such as kiln_signin or sso_login_url.

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 gives no guidance on when to use this versus other authentication flows, nor does it mention prerequisites such as being unauthenticated. The phrase 'Kick off' implies initiation but does not tell the agent what to do next or when to avoid it.

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