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

Annotations already hint at idempotency and non-destructiveness, but the description adds substantial context: it explains the permanent vs session behavior, the fact that calling with no args returns a link, and the JWT token usage. This goes beyond the annotations and clarifies the expected workflow.

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 adequately concise, with a clear front-loaded purpose ('log in in the browser, copy the access token') followed by usage details. Each sentence contributes value, though it could be slightly more streamlined.

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?

Given the simple schema (one optional param), no output schema, and existing annotations, the description covers the main usage scenarios (permanent config vs session) and the token parameter. It doesn't detail return values or error handling, but for an authentication tool with these specs, 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?

Schema coverage is 0%, and the description compensates well by explaining that the 'token' parameter is a JWT to paste after user login. It indicates that calling without arguments retrieves a link, which is essential parameter context that the schema lacks.

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 its purpose: authenticate with MCP.AI for IDE agents via browser login and token retrieval. It specifies the resource (MCP.AI) and the action (authenticate), but it does not explicitly differentiate from the sibling 'connect' tool, so it's clear but lacks sibling distinction.

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 provides explicit usage instructions: adding the token to config for a permanent connection or pasting it for a session-only login, and explains the no-arg call to get the link. It doesn't give exclusions vs alternatives, but the context of when to use each mode is clear.

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