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

The description discloses key behaviors beyond the annotations: calling with no args yields a link, passing a token establishes a session-only login, and the config approach provides a non-expiring connection. It does not mention return format or error handling, but the idempotent and non-destructive hints are consistent. This adds useful context while leaving minor gaps.

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 somewhat verbose, with an introductory phrase 'MCP.AI for IDE agents (Cursor, etc.)' and a meandering structure. While the information is complete, it could be tightened for clarity and front-loading. It remains understandable but is not optimally concise.

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 one optional parameter and no output schema, the description covers the essential scenarios: how to get a link, how to pass a token, and the alternative config approach. It does not elaborate on response handling or edge cases, but is sufficiently complete for an agent to invoke correctly.

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's 'token' property has no description, but the description explains that the token is a JWT to be pasted for session login, and that omitting it yields a link. This fully clarifies the parameter's meaning and the no-args case, compensating for the 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 clearly states the tool's purpose: authentication via browser login and token handling. It explains the log-in process, token acquisition, and invocation with/without a token, distinguishing between permanent config-based auth and session-only token-based auth. However, it does not explicitly differentiate this tool from the sibling 'connect' tool, leaving some ambiguity.

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 explicit usage guidance: it recommends adding the token to the server config for a permanent connection, and using the tool itself for session-only login by pasting the token or calling with no args to get a link. This clearly indicates when to use the tool versus alternatives and how to invoke it in different scenarios.

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