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

The description goes beyond the annotations by explaining what each mode does: no-args returns a login link, token provides a session-only login, and config setup creates a permanent non-expiring connection. It does not mention failure modes or token expiry behavior, but does disclose the main behavioral options.

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 dense but efficient, packing purpose, configuration advice, and two call conventions into three sentences. The opening phrase is slightly awkward, but every sentence contributes actionable information.

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?

Given only one optional parameter and no output schema, the description covers the essential context: why the tool exists, how to authenticate permanently, how to do a session-only login, and what to do with no args. It could mention response behavior more precisely, but it is largely complete for this simple 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?

Schema coverage is 0%, so the description carries the full burden for the token parameter. It clearly explains that token is an optional JWT pasted by the user, and that omitting it returns the login link. This is far more informative than the bare schema.

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 that the tool authenticates the user, instructs how to obtain an access token, and distinguishes between a permanent config-based login and a session-only token login. It gives concrete call patterns, making the purpose unambiguous.

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 clear guidance on when to pass a token vs. call with no args, and recommends the permanent header config over session login. It does not explicitly compare against sibling tools like connect, but the workflow guidance is strong enough for correct tool selection.

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