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

Beyond the annotations, the description discloses important behavioral details: config-based auth becomes permanent and non-expiring, pasted-token auth is session-only, and no-args returns a link. It leaves some details unmentioned, such as error behavior when an invalid token is supplied.

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 compact, with no major redundancy, and all sentences contribute invocation or usage information. Its structure is slightly dense but still scannable.

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 simple one-parameter authentication tool, it covers persistent config, session-only login, and the no-argument link flow. It does not specify exact response shapes or failure modes, but the absence of an output schema makes this acceptable.

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 0%, but the description compensates for the one optional `token` parameter by explaining that it is a JWT pasted by the user and that omitting it yields the login link. This is adequate for a single optional string parameter.

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 identifies this as the authentication tool for MCP.AI/IDE agents, explaining the browser login and token flow. It successfully conveys the tool's distinct purpose, though it does not explicitly contrast it with the sibling tool `connect`.

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 gives strong situational guidance: prefer adding the token to the server config for a permanent connection, use a pasted token for session-only login, or call with no arguments to obtain the login link. It does not state exclusions or contrast with alternative auth-related sibling tools.

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