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

Annotations already declare idempotentHint=true and destructiveHint=false, so the safety profile is known. The description adds context about the token lifecycle (non-expiring vs. session-only) and explains the browser login step, which goes beyond the annotations. However, it doesn't mention what happens after successful authentication (e.g., response format or side effects on server state), so it's not fully transparent.

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 two sentences but somewhat lengthy; the first sentence introduces the purpose, the second provides detailed instructions. Every part contributes useful information, but it could be slightly more streamlined without losing clarity.

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, the description fully covers the authentication flow, usage patterns, and parameter semantics. Annotations cover safety, so no further disclosure is needed. It is complete for its scope.

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 clearly explaining the token parameter: it is an optional JWT for session-only login, and the no-arg call fetches the link. This adds meaning beyond the bare schema definition, though it doesn't describe the token format in detail.

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 what the tool does: it facilitates authentication for IDE agents via browser login and token handling. It explicitly identifies the resource (access token) and distinguishes from sibling tools like 'connect' or 'marketplace' by focusing on the authentication flow.

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 explicit usage instructions with two distinct methods: permanent configuration via header vs. session-only token paste. It explains when to call with no args (to get link) and when to pass a token, and even recommends the permanent config as best practice, offering clear guidance.

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