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

Annotations indicate idempotentHint=true and destructiveHint=false, which the description does not contradict. But the description doesn't disclose important behavioral traits like what happens if the token is invalid, or that the session token expires, beyond saying it's session-only. Given the annotations are minimal, some more context could be added.

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 but information-dense, covering multiple scenarios in two sentences. It uses a personable tone that is still clear. Slightly long but each clause provides value, so it earns a high score.

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 the tool has only 1 optional parameter, no output schema, and moderate complexity for authentication behavior, the description adequately covers both modes of invocation and the permanent alternative. It could mention common pitfalls (e.g., token expiry or needing to restart server), but it is mostly complete for an auth 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?

The schema only defines a 'token' string with no description, and the description partially explains it: it must be a JWT pasted by the user. Schema coverage is 0%, so the description must compensate, but it does not elaborate on token format or validation beyond calling it a JWT. It would be better to explain what happens if omitted (gets link) vs. provided (session login).

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 this tool is for authentication, specifying it logs in via browser and returns an access token or accepts a pasted token. However, it could be more precise about the operation (getting auth link vs. validating token) and could differentiate from the sibling tool 'connect' more explicitly.

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 explicitly explains both primary use cases: with no args to get the login link, and with a token for session login. It also recommends a better permanent configuration approach via headers, which is helpful guidance.

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