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

The description clearly states 'No authentication required; rate limited per IP' which provides practical behavioral context beyond the annotations. The annotations already declare readOnlyHint=true, openWorldHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is well-covered. The description adds a critical constraint (rate limiting).

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?

Two sentences achieve clarity, guidance, and behavioral disclosure with zero waste. The instruction about thread_id is front-loaded and actionable.

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 general Q&A tool with no output schema and only two well-documented parameters, the description is complete enough. It gives the scope, a key usage hint (threading), and a behavioral constraint (rate limit). A minor gap: it doesn't mention what happens if an out-of-scope question is asked, but the explicit domain list compensates.

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?

Schema description coverage is 100%, so the schema already fully documents both parameters. The description adds detail by specifying the domains the question covers ('about integration, ad units, application, reporting, or payments') and the threading behavior for thread_id, going slightly beyond the schema's basic descriptions. However, with complete schema coverage, the contribution is modest, earning the baseline of 3.

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 uses a clear verb ('Ask') and specific resource ('the Rocket Sloth setup agent'), and explicitly lists the covered domains (integration, ad units, application, reporting, or payments). This differentiates it well from sibling tools like 'about', 'integration', 'reporting', or 'payments' which might also involve asking questions but likely in a more specialized manner.

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 explicit guidance on when to use it ('Ask the Rocket Sloth setup agent anything about...') and how to use it correctly ('Pass the returned thread_id on follow-up questions to keep context'). It does not explicitly mention when not to use alternatives, but the domain list implicitly covers it, and the depth of context is appropriate for a general Q&A tool.

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