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

Beyond annotations, the description reveals that a config-level token is permanent and non-expiring, a passed-in token is session-only, and a no-arg call returns the login link. This meaningfully informs the agent of the behavior's consequences.

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 information-dense and front-loaded with the purpose, with all sentences contributing to use or setup. There is minor redundancy and a somewhat run-on structure, but nothing superfluous.

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 single-optional-parameter tool with no output schema, the description adequately covers the key usage paths: getting the auth link, submitting a JWT, and setting up a permanent header. It does not describe the response after passing a token, but that is not critical at this complexity.

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 has 0% description coverage, but the description compensates by explaining that token is an optional JWT, what happens when it is passed, and what happens when it is omitted. More detail on token origin or validation would help, but the essential meaning is clear.

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 centers on authentication and covers both obtaining a login link and submitting a token. However, it mixes user/setup instructions with tool-call semantics, so the core verb+resource statement is not as crisp as it could be.

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 is explicit about two invocation modes: call with {token} for session-only login and call with no args to get the link. It also mentions a permanent configuration alternative, though it does not explicitly exclude or compare sibling tools like connect.

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