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

Beyond the annotations, the description discloses that a config-based token is permanent/non-expiring, that pasted tokens are session-only, and that calling with no args returns the login link. It does not state the output format or what happens with invalid tokens, but it adds meaningful behavioral context.

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 at three sentences and front-loads the core action. The opening phrase 'MCP.AI for IDE agents (Cursor, etc.)' adds audience context but is slightly distracting; still, every sentence contributes usable information.

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 one-optional-parameter schema, no output schema, and sparse annotations, the description covers the main user flows: permanent config, session token, and link retrieval. It lacks explicit return-value details and error handling, but for this complexity level it is largely sufficient.

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 schema has only an undocumented optional 'token' parameter with 0% description coverage. The description compensates by explaining that token is a JWT for session login and that omitting it returns the login link, which is essential semantic information not present in the schema.

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 this tool authenticates the user by browser login and token entry, with a specific action of obtaining an access token or login link. It does not explicitly distinguish itself from the sibling 'connect' tool, but the verb and resource are reasonably specific.

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 concrete when-to-use guidance: prefer adding the token to the server config for a permanent connection, or paste a JWT for a session-only login, or call with no args to get the link. It does not mention alternatives among sibling tools or exclusion cases, so it stops short of a 5.

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