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

The description explains the two authentication modes (permanent vs session) and the flow of getting a token. It does not mention potential side effects like token invalidation or rate limits, but the idempotent hint is consistent and no contradiction exists.

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 moderately concise but somewhat run-on. It contains all necessary information in two sentences, but the structure could be tidier (e.g., separating the permanent and session options more distinctly).

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) and annotations, the description covers how to use the tool and what to expect (link generation, token authentication). It does not explicitly mention return values or error cases, but these are not critical for an auth tool.

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 sole parameter 'token' is clearly explained: it is optional, used for session-only authentication when passed, and omitted to obtain the login link. This fully clarifies the parameter's role.

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 the tool's purpose: authenticating with MCP.AI for IDE agents. It explicitly mentions 'log in' and 'access token', making the resource and action unambiguous.

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?

Provides detailed step-by-step instructions: log in via browser, copy token, then either add to server config for permanent connection or pass token as parameter for session login. Also explains the no-args option to retrieve the login link.

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