setup_authentication

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

No annotations are provided, so the description bears full responsibility for behavioral disclosure. It says 'Get instructions,' which suggests a read-only operation, but the name 'setup_authentication' implies a mutating action. It doesn't state whether calling this tool changes state, requires user interaction, or returns a one-time code. This ambiguity is a significant gap.

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?

A single sentence, front-loaded with the action and purpose. No wasted words. It is appropriately concise for a zero-parameter tool.

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?

For a zero-parameter tool with an output schema, the description could be sufficient, but it leaves out key context: whether the tool is a read-only instructional endpoint or a mutating setup flow, what the output contains (URL, steps, token), and any preconditions like having a client ID or secret. The output schema may cover return format, but the description doesn't hint at side effects or prerequisites, which are essential for an authentication setup 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 the description doesn't need to explain any. The schema is empty, and there is nothing for the description to add. Baseline 4 applies because there are no parameters to document.

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 clear action: get instructions for connecting the server to an Oura account. It names the verb and resource, and it's obviously distinct from the sibling get_* data retrieval tools and check_auth_status. However, it doesn't explicitly contrast with check_auth_status, leaving minor ambiguity about whether this tool both initiates and returns instructions or just returns pre-existing instructions.

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 implies use when you need to connect the server to an Oura account, but it doesn't explicitly state when to use it versus check_auth_status (which presumably checks if auth is already set up). No mention of prerequisites or when not to use it. The usage context is implied but not explicit.

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