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

Annotations already declare readOnlyHint=true, openWorldHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is fully covered. The description adds that it returns the exact same data as GET /api/signup, which is useful context, but doesn't add much beyond that. No contradiction with annotations.

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 with no wasted words. The key information (what it returns, that it's authoritative, and the instruction to read it before joining) is front-loaded and every sentence earns its place.

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 zero-parameter read-only tool with rich annotations, the description is nearly complete. It explains the return content and the recommended usage order. It could mention the response format explicitly, but the equivalence to GET /api/signup covers that. The absence of an output schema is mitigated by the description's explanation of what the response contains.

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, so the schema is trivially complete (100% coverage). The description adds meaning by explaining what the returned schema contains (required fields, privacy terms), which helps the agent understand the value of the response even though there's no output schema.

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 returns the authoritative JSON schema, required fields, and privacy terms for the waitlist transaction, and explicitly equates it to GET /api/signup. This is a specific verb+resource that distinguishes it from sibling tools like join_waitlist and update_waitlist.

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 says 'Read this before joining,' which gives clear context for when to use this tool (before joining the waitlist). It doesn't explicitly mention alternatives or when not to use it, but the sibling names make the distinction obvious and the instruction is actionable.

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