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

Beyond the annotations, the description discloses what a no-arg call does, what a token-bearing call does, and that a configuration header gives a permanent non-expiring connection. It aligns with idempotentHint=true and does not contradict readOnlyHint=false.

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 and front-loaded with the auth flow while separating the permanent-config and session-only paths using 'Best:' and 'Or:'. It is slightly dense but every clause contributes 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 an auth tool with one optional parameter and no output schema, it explains both invocation modes and the underlying login concept well. It does not describe exact success/failure result content, but the practical behavior 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?

The input schema only defines an optional token string with no description, but the tool description compensates by showing the expected call shape { token: "<jwt>" } and the no-arg behavior. This covers the parameter semantics despite 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 states with specific language that this tool authenticates an MCP.AI server for IDE agents, via browser login and JWT/access token passage. It also clearly distinguishes the behavior from the sibling tools such as connect, marketplace, and report_bug.

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?

It gives explicit usage guidance: use the server config header for permanent auth, paste a token for session-only auth, or call with no arguments to get the login link. It does not name alternative sibling tools or exclusions, but the intended usage is clear.

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