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

Annotations already signal idempotency and non-read-only, and the description adds valuable context about the two authentication modes (non-expiring header vs session-only). It explains that calling with no args returns a link, and with a token authenticates. No contradictions with annotations.

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 reasonably concise, with three sentences that front-load the purpose and then provide usage details. It includes some extraneous context like 'MCP.AI for IDE agents (Cursor, etc.)' but this helps clarify the intended environment. The information is well-structured for quick reading.

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?

The tool is simple (one optional param, no output schema), and the description covers both authentication flows and the no-arg behavior. It does not mention return values beyond 'get the link', nor error handling, but given the idempotent and non-destructive annotations, this feels adequate. It could be improved by stating what happens after successful token submission.

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 schema description coverage at 0%, the description carries the full burden. It explains the 'token' parameter is a JWT to paste, that it is optional (since no-args is allowed), and its role in obtaining a session-only login. This is sufficient for practical use, though it does not specify the exact format beyond 'jwt' or potential validation rules.

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 is for logging in and obtaining an access token, with specific instructions for both permanent (config header) and session-only (token argument) authentication. It distinguishes itself from sibling tools like 'connect' by explicitly framing it for MCP.AI and IDE agents.

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 two clear usage paths: 'Best: add it to this server's config...' for a permanent token, or 'paste it here for a session-only login...' for temporary access. It also explains the no-arg case for retrieving the login link. However, it does not explicitly compare itself to the 'connect' sibling tool, so some agent might still be unsure when to choose this over alternatives.

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