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

Annotations already indicate idempotent, non-read-only, and non-destructive behavior. The description adds useful context about permanent versus session-only authentication, the browser login flow, and the Authorization header approach. It does not contradict any 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 compact and mostly front-loaded, conveying the core flow in two sentences. It is slightly run-on and starts with an audience qualifier rather than the action, but every sentence contributes essential usage details.

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?

No output schema exists, so the description carries the burden of explaining expected results. It does say 'with no args to get the link,' but it does not describe the response after submitting a token or error/edge-case behavior. Overall, it is sufficiently complete for a simple authentication 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?

With 0% schema description coverage, the description compensates by explaining the optional 'token' parameter as a JWT to paste and clarifying the no-args behavior returns a login link. This adds meaning beyond the schema's bare string property, though it could be more explicit about validation or failure cases.

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 an IDE agent to MCP.AI by logging in and providing an access token. It distinguishes itself from siblings like 'connect' and 'marketplace' by focusing specifically on the authentication flow and token handling.

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 explicit usage guidance: prefer adding the token as a persistent header, or use a session-only login by pasting a token or calling with no args to get the login link. It does not explicitly name alternative tools or state when not to use this tool, but the two-mode workflow is well explained.

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