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

Beyond the annotations, the description explains the no-arg behavior returns a login link, the token call performs session-only login, and config-based auth gives a non-expiring connection. It does not cover response format on a token call, but the key behavioral differences are disclosed.

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 and front-loaded with the login intent. It includes setup and session instructions in a dense but useful format. The long sentences are slightly heavy, but every piece of information adds value.

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 tool with one optional parameter and no output schema, it covers the core workflow well: how to invoke, what value to pass, and what the no-arg call returns. It could be slightly richer about success/failure responses, but overall it is complete enough for an agent to use correctly.

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?

There is one optional token parameter, and the description gives explicit meaning: after the user pastes the JWT, call with `{ token: "<jwt>" }`, while calling with no args is also acceptable. This fully compensates for the 0% schema description coverage.

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 authenticates to MCP.AI for IDE agents: log in, copy the access token, then provide a session token or get a link. It is specific about the action and resource and distinguishes this from sibling tools by focusing on login/authentication rather than connecting, marketplace, or version actions.

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 says when to call the tool with no args to obtain the link, and when to call it with a token after the user pastes one. It also gives an alternative setup path with a permanent Authorization Bearer header, which is strong usage guidance for the agent.

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