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

Without annotations, the description fully covers the authentication flow: returns authorization URL, browser interaction required, token cached, and action retry needed. It does not discuss error states or re-login behavior, but provides adequate transparency for the intended use.

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?

Two sentences with no waste: first sentence states purpose, second explains the workflow and a practical caveat. Every sentence adds value.

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 description explains the main flow and a practical limitation (browser popups). Missing details on idempotency, error handling, and what happens if already authenticated, but given the tool's simplicity, it is fairly 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 input schema has zero parameters, so schema coverage is 100%. The description adds no param details because none exist, meeting the baseline of 4 for parameterless tools.

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 authenticates with the backend, explains the OAuth flow, and distinguishes from related tools like 'logout' and 'whoami' by describing the specific action of obtaining and caching a token.

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 not logged in and mentions retrying after approval, but lacks explicit when-not conditions (e.g., if already logged in) and does not mention alternatives among siblings.

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