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

The annotations already indicate this is not read-only, not destructive, and idempotent. The description adds context about persistence: config-based header gives a permanent non-expiring connection, while passing a token gives session-only login. This goes beyond the annotations by describing the outcome of each method, satisfying the disclosure burden.

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 structured with a lead-in, then 'Best' and 'Or' options, keeping related details together. It's not overly verbose for the information delivered, though it could be tightened slightly. Each sentence contributes to the usability.

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 simple tool with one optional param and no output schema, the description explains both the input (token) and behavior (returns link when no args). It mentions the two use cases and the config alternative. No further context is needed for an agent to invoke it 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 single optional parameter 'token' is described as a JWT for session login, adding meaning beyond the schema's bare 'string' type. The description clarifies that calling without args yields a link, and calling with token logs in. Since schema coverage is 0% but the description compensates fully, this scores well.

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 authenticates the MCP server for IDE agents, differentiating it from sibling tools like connect or marketplace. It specifies the action (login) and the resource (server connection), making its 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?

It provides explicit instructions on when to use this tool (for authentication) and explains two invocation modes: passing an optional token for session-only login, or no args to get a link. It also suggests a config-based permanent method. However, it doesn't mention when not to use it or alternative authentication methods beyond these two, so it lacks explicit exclusions.

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