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

It discloses persistence semantics: config header yields a permanent non-expiring connection, while a pasted token yields a session-only login. It also reveals that no-arg calls return the link. This adds meaningful behavioral context beyond the annotations' idempotent and non-destructive hints.

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 dense but every sentence carries useful information, and the recommended 'best' approach is placed early. It could be slightly more polished but is not padded.

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 tool with one optional parameter and no output schema, the description covers both login modes and the fallback no-arg behavior. It does not explain post-authentication effects on other tools, but that is reasonably implicit for an auth helper.

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?

With 0% schema description coverage, the description compensates fully by explaining the only parameter: token is a JWT, is optional, and should be passed only after the user pastes it. It even gives the exact payload shape.

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 positions the tool as an authentication mechanism for IDE agents, describing a browser login flow with access tokens. It identifies the resource ('access token', 'login link') and the action, though it does not explicitly contrast it with the sibling 'connect' tool.

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?

It gives explicit conditional instructions: call with no args to get a link, call with { token: '<jwt>' } for session-only login, or configure a header for a permanent connection. This is a clear decision tree for invocation, even if it does not discuss when to use an alternative tool.

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