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

Annotations already imply readOnlyHint=false and idempotence, and the description adds useful behavioral detail about permanent vs. session-only logins. However, it does not describe what the API returns or what happens with an invalid JWT, limiting transparency for an agent.

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 purposeful: each clause adds operative detail about either configuration, session setup, or argument usage. Though it's really one run-on paragraph, it's still scannable and information-dense.

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?

There is no output schema, so the description is expected to explain return outputs. It does for the no-arg path ('to get the link') but not for the token-paste path. For a simple authentication utility, the main interaction models are still adequately covered.

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 has a single token parameter with no description. The description compensates by explicitly identifying { token: '<jwt>' } and saying that omitting it triggers link generation. This makes the parameter semantics clear enough for invocation.

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 this is an authentication tool: 'log in in the browser, copy the access token' and 'MCP.AI for IDE agents'. It identifies the tool's role and gives concrete login context, but it does not explicitly distinguish itself from 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 highly usable guidance: the best approach is adding the Authorization header to the server config, while pasting the token gives a session-only login. It also explains when to call with no args to receive the login link. It doesn't explicitly mention what the sibling 'connect' tool should be used for, but the indication here is clear.

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