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

The description discloses behavioral traits beyond annotations: the browser login flow, token persistence (permanent vs. session-only), and the no-args behavior that returns a link. It does not contradict the idempotentHint and destructiveHint 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 slightly lengthy but each part adds necessary information about the authentication flow and token options. It could be formatted with bullets for easier scanning, but it remains efficient and focused.

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 tool with only one optional parameter and no output schema, the description covers the main functional flow and expected outcomes well. It doesn't explicitly state the response format, but the instructions are sufficient for an agent to successfully invoke the tool.

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?

Even though the schema has 0% coverage and no parameter descriptions, the description fully explains the 'token' parameter: it expects a JWT string, is used when pasting a session token, and can be omitted to receive a login link. This completely compensates for the schema's lack of parameter 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 identifies the tool as an authentication flow for MCP.AI within IDE agents, explaining the login process and token usage. It distinguishes itself from sibling tools by focusing specifically on authentication rather than connection or marketplace functions.

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 explicit usage instructions: add the token to config for a permanent non-expiring connection, or paste a session token, or call with no args to get the link. It lacks an explicit comparison with the 'connect' sibling tool, so alternate selection is not fully covered.

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