get_twitch_user

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

No annotations are provided, so the description carries full transparency burden. It discloses returned fields but omits operational behavior like authentication requirements, rate limits, or error handling for unknown users. 'Obtiene información' suggests a safe read but does not explicitly state non-mutation or other constraints.

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 that front-loads the action and quickly lists relevant returned fields. It is free of filler, and the trailing 'etc.' is an acceptable abbreviation for an open-ended list.

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 simple—one required parameter, no output schema—so the description's field list (ID, display name, description, avatar, creation date) meaningfully covers return expectations. However, it does not mention not-found behavior or authentication prerequisites, which would make it fully 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 schema already fully describes the 'login' parameter (Twitch username, lowercase), giving 100% schema coverage. The description only paraphrases that it looks up by login, adding no new semantic detail beyond the schema.

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 it retrieves detailed Twitch user information by login, using the specific verb 'Obtiene' and a defined resource. It distinguishes itself from sibling tools like check_user_live or get_user_videos, which target different data types.

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 explicit guidance on when to use this tool versus alternatives such as check_user_live or get_creator_insights. Usage is only implied by the phrase 'por su nombre de usuario', with no exclusions or alternative recommendations.

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