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

It discloses important behavior beyond the annotations: permanent config vs session-only token, and the no-argument behavior of returning a login link. There is no contradiction with the annotations, though it does not describe what happens on invalid tokens or how the tool reports success/failure.

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 appropriately compact and front-loaded: it states the purpose, then the permanent setup, then the session-only invocation options. The phrasing is slightly awkward in places, but every clause adds meaningful guidance.

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 one-parameter authentication tool with sparse annotations and no output schema, the description provides enough context to use the tool for permanent configuration, session-based login, and link retrieval. It could be more explicit about exact response behavior and error cases, but it is largely 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?

The input schema only defines 'token' as a string with no description, but this description adds key semantics: the token is an access JWT, it is optional, it is used for session-only login, and omitting it returns a login link. This is strong compensation for the 0% schema description coverage.

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 identifies the tool as an authentication flow for MCP.AI in IDE agents: the user logs in through the browser, obtains an access token, and either configures it permanently or passes it to the tool. It does not explicitly contrast itself with the sibling tool 'connect', so it narrowly misses full differentiation.

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 gives clear usage branches: use the config header for a permanent connection or call the tool with a token for session-only login, and call with no arguments to receive the login link. It does not explicitly address when not to use the tool or name alternatives.

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