github_users_get_by_id

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

With no annotations provided, the description carries full burden for behavioral disclosure. It states 'get a user' but gives no details about authentication needs, rate limits, return format, error handling, or side effects. This is a minimal description that adds no behavioral context.

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 sentence of five words, very concise. It is front-loaded and easy to read. However, it could benefit from a bit more structure or detail without becoming verbose.

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 no output schema and no annotations, the description is too sparse to be complete. It does not explain the return payload, whether it returns multiple users, or any edge cases (e.g., what happens when ID is invalid?). For a simple look-up tool, it should at least hint at the response structure.

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 input schema has 100% coverage with one parameter 'account_id' described as 'account_id'. The description does not add meaning beyond the schema, but per guidelines, high schema coverage yields a baseline of 3. The parameter semantics are adequate but not enhanced.

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 ('get a user') and the identifier ('using their ID'), making the purpose specific. However, it does not differentiate from the sibling tool 'github_users_get_by_username', which uses a different identifier method. The verb+resource is clear, but lack of sibling distinction prevents a 5.

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 no guidance on when to use this tool versus alternatives like 'github_users_get_by_username' or 'github_users_get_authenticated'. It does not mention prerequisites, context, or exclusions.

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