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

The description adds useful behavioral context beyond the annotations: it reveals that calling with no args returns a login link, and that pasted tokens create session-only authentication while config-header tokens are permanent and non-expiring. The behavior does not contradict the idempotentHint or other annotations.

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 compact and information-dense, packing purpose, usage modes, and call syntax into two sentences. It is not perfectly structured, but every sentence adds necessary guidance and there is little fluff.

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 auth tool with one optional parameter, the description is largely complete: it covers the login flow, token acquisition, permanent vs. session configuration, and invocation patterns. It does not detail the exact return value when a token is passed, but it provides enough context for an agent to use the tool effectively.

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 carries the full burden, and it succeeds: it explains that the optional token is a JWT, how to pass it, and what happens when it is omitted. This gives the agent clear, actionable parameter semantics beyond the bare 'token' string property.

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 centers on authenticating to MCP.AI for IDE agents, describing a login flow and token-handling behavior. It is specific to this tool's auth purpose, though it does not explicitly contrast itself with sibling tools like 'connect'.

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 concrete usage guidance: either configure an Authorization header for a permanent connection or paste a token for a session-only login. It clearly explains when to call without args versus with a token, though it doesn't explicitly state when not to use this tool versus alternatives.

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