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

Annotations indicate readOnlyHint=false, idempotentHint=true, destructiveHint=false. The description adds behavioral context: it explains that using no args returns a link (for browser login), and that passing a token enables a session-only login. However, it does not disclose potential side effects (e.g., storing the token) or what happens after successful authentication. It adds some value beyond annotations but could be more explicit about state changes.

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 dense but not overly verbose. It is front-loaded with the core action ('log in in the browser, copy the access token') and then logically explains the two usage methods. Every sentence adds relevant information, though it could be slightly tightened without losing meaning.

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 a single optional parameter, no output schema, and moderate complexity (authentication with two modes), the description covers the primary use cases: obtaining a link, providing a token, and the permanent config option. It doesn't detail return values or error cases, but for this scope it is sufficiently complete.

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 schema description coverage at 0%, the description compensates by explaining the single 'token' parameter: it is a JWT used for session-only login when pasted, and optional because calling with no args retrieves a login link. This adds meaning beyond the bare schema definition.

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 users for MCP.AI IDE agents. It specifies the verb (log in, paste token) and the resource (MCP.AI), and distinguishes usage modes (permanent config vs session token). While it doesn't explicitly contrast with sibling 'connect', the purpose is unambiguous and actionable.

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 instructions: log in in browser, copy token, then either add to server config for permanent access or pass token for session login. It also explains the no-args call to get a link. It lacks explicit when-not-to-use guidance or alternatives, but the context is clear enough.

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