Ray setup help

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

The readOnlyHint annotation is true, and the description does not contradict it. It adds value by explaining that the tool is a diagnostic/help tool that leads to a retry, which is a safe action. It also discloses the server error message, giving insight into what the tool addresses. While it doesn't explicitly state that no data is modified, the context makes that clear given the read-only hint. A score of 4 is appropriate because it enhances the annotation without full redundancy.

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 well-structured and densely informative. Each sentence contributes: it states the problem, gives the reason, provides the exact fix steps, and includes the server error for verification. It is not padded with fluff. The information is front-loaded with the core issue and then details, making it easy for an agent to parse quickly.

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 no parameters, no output schema, and no siblings, the description is fully complete. It tells the agent exactly what the tool does, why it exists, how to use it (the fix steps), and what to expect. Everything an agent needs to correctly invoke and benefit from this tool is present, including the retry action and the URL for key creation.

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 tool has zero parameters, and the schema description coverage is 100% (vacuous). The description doesn't need to explain parameters. The baseline for no parameters is 4, and the description adds nothing about parameters because there are none. It correctly focuses on the operation itself, not on input handling.

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: to help when Ray's tools fail to load due to an API key rejection. It specifies the resource (Ray setup) and the action (help with fixing the key and retrying). Even though there are no sibling tools, the description makes its function unmistakable. It goes beyond a vague statement and provides concrete context.

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 explicitly says to call this tool to see how to fix the issue and to retry the connection. It also explains the underlying cause (invalid API key) and the steps to resolve it, making the trigger conditions clear. No alternatives exist, but the guidance is unambiguous about when and why to invoke this tool.

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