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

Annotations indicate idempotentHint=true but no destructive or read-only hints, which is neutral. The description adds context on how the authentication can be made permanent (config header) or session-only, and mentions that the token is a JWT, providing extra behavioral detail. However, it doesn't explicitly state that calling the tool opens a browser or that the token has expiration, but it does imply a flow. Given the annotations are sparse, the description provides additional value but could elaborate on the login link behavior.

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 concise—two sentences—and front-loads the essential purpose. Every sentence earns its place: it gives context for IDE agents, explains the permanent and session options, and specifies the call patterns. No fluff or redundancy.

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 tool's complexity (an authentication flow with two modes), the description adequately covers the necessary steps for an agent to guide the user. The schema is minimal with no output schema, but the description sufficiently explains the process, including the need to copy the token and the distinction between permanent and session (URL indication). This is complete for practical use.

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 only one optional parameter and schema description coverage at 0%, the description compensates by explaining that the 'token' parameter should be a JWT pasted by the user, and that calling with no args returns a link. This adds meaning beyond the bare schema, which only defines the property as a string. The description clarifies the parameter's role, so a high score is justified.

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: to authenticate IDE agents by logging in through the browser and obtaining an access token. It specifies the verb 'authenticate' and the resource (the AI service), and it distinguishes itself from siblings by focusing on the login process, whereas siblings like 'connect' and 'marketplace' suggest different concerns.

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 explicit usage guidance: it explains when to use the tool (for login via browser), and offers two distinct usage modes—permanent configuration via header in config, or session-only login by pasting the token. It also instructs calling with no args to get the link, making the when-to-use crystal clear.

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