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

Beyond annotations (idempotentHint, readOnlyHint false), the description discloses important behavioral nuances: token-based login is session-only while config-based is permanent and non-expiring, and calling with no args returns a link. This is useful context that helps the agent understand the tool's side effects and longevity.

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 somewhat wordy and the first sentence is awkwardly phrased, mixing an audience note with instructions. It could be tighter, but it avoids redundancy and all sentences contribute either to usage or context. Structure is acceptable but not exemplary.

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 lack of an output schema, the description partially covers return behavior ('to get the link') but does not specify what the tool returns upon successful token submission or any error handling. The authentication flow is explained, but the focus on config instructions distracts from the tool's own output. It is sufficient for a simple tool but not fully 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?

Schema coverage is 0%, so the description carries the full burden. It clearly explains the 'token' parameter: it is a JWT to be pasted after user authentication, and it is optional since calling with no args is supported. This adds meaningful semantics beyond the bare schema.

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 conveys the tool's function: authenticating to the MCP.AI server by either obtaining a login link or submitting a token. It distinguishes this from generic connection via its focus on authentication, though the opening 'MCP.AI for IDE agents' is somewhat vague and not a crisp verb-first statement.

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 modes: call with no args to get a login link, or call with a token for session-only login. It also contrasts this with the more permanent config-based approach, giving clear guidance on when to use each. It does not explicitly compare to sibling tools but offers practical alternatives.

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