setup_auth

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

No annotations are provided, so the description carries the full burden. It discloses the two-step OAuth flow, a key behavioral trait, but does not detail potential side effects, error conditions, or state persistence beyond the flow. This is adequate but leaves gaps.

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 two sentences long, front-loaded with the core purpose, and contains no superfluous text. Every sentence is essential for understanding the tool's operation.

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 the tool's moderate complexity (two-step OAuth), one parameter, and no output schema, the description adequately explains the overall flow. However, it omits details about expected outputs (authorization URL format) and error handling, which would be helpful for an agent.

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?

Schema description coverage is 100% (the 'pin' parameter is well-documented). The description adds value by explaining the two-step usage pattern (first call empty, second call with PIN), which is not fully captured in the schema's 'leave empty to start OAuth flow'.

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 tool sets up Twitter authentication via OAuth 1.0a PIN-based flow, specifying the two-step process. This verb-resource pair distinguishes it from sibling tools (e.g., tweet, thread) which are unrelated to authentication.

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 instructions on when to call without PIN (to get authorization URL) and when to call with PIN (to complete), establishing a clear usage context. However, it does not include exclusions or alternative tools for authentication.

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