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

The description adds useful behavioral context beyond annotations: it explains that config-based tokens are permanent and non-expiring, while pasted tokens are session-only. It does not detail failure modes or success response formats, but annotations already establish safety expectations.

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 fairly compact and front-loaded with the core browser-login flow. The 'MCP.AI for IDE agents' opener and the two-part config-vs-session guidance earn their place, though a slightly cleaner structure would improve it.

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-optional-parameter auth tool with no output schema, it covers the main workflow well: login flow, permanent config option, session-only option, and no-args behavior. It does not specify what the tool returns after token authentication, which leaves some ambiguity, but the description is otherwise adequate.

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 is bare with 0% coverage, and the description compensates by explaining that the optional token parameter is a JWT to be pasted after login. It also makes clear that calling without arguments returns the login link, which adds meaning to an otherwise undocumented 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 states that the tool is for authentication: the user logs in via browser, pastes a JWT, or calls with no args to receive a login link. It distinguishes itself by being the auth/token entry point among the listed sibling tools.

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 explicitly distinguishes the permanent config-based login from the session-only pasted-token login, and says to call with no args to get the link. It gives concrete branch guidance, though it does not explicitly mention alternatives like 'connect'.

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