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

The description adds value beyond annotations by explaining the two modes (no args returns link, token arg authenticates). It aligns with idempotentHint and destructiveHint false, and does not contradict annotations. It gives a clear behavioral overview.

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 (2 sentences), front-loaded with essential info, and avoids redundancy. It efficiently covers purpose, audience, and usage patterns without unnecessary 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?

For a simple tool with one parameter and no output schema, the description is nearly complete. It explains the authentication flow, permanent vs session tokens, and calling conventions. Minor omissions (e.g., error handling) do not significantly detract.

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?

Despite 0% schema description coverage, the description thoroughly explains the 'token' parameter: it's a JWT access token, and it describes how to obtain and use it. This compensates for the lack of schema documentation.

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 authenticates users for MCP.AI IDE agents, explaining login and token handling. It distinguishes itself from sibling tools like 'connect' and 'marketplace' by focusing solely on authentication.

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 context: logging in via browser, copying token, adding to config for permanent connection, or pasting for session login. It also specifies calling with no arguments to get the link. It does not explicitly state when not to use it, but the usage scenarios are clear.

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