signupgenius_get_public_signup

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

Goes beyond the readOnlyHint/openWorldHint annotations by disclosing that it fetches the rendered page, returns a structured envelope with specific fields, and works without API credentials. This adds valuable context about behavior and requirements, with 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?

The description is three sentences, each earning its place: it states the action, lists output fields, and gives a concrete use case. No fluff or redundancy; information is front-loaded.

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?

Given a single parameter, no output schema, and good annotations, the description is complete: it explains input, output structure, auth requirements, and when to use. The presence of many sibling tools is mitigated by the explicit public/no-auth framing and use-case sentence.

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 input schema already covers the parameter fully (100% coverage), describing both full URL and slug formats. The description provides an example URL pattern, but this largely duplicates the schema description, so it adds minimal extra meaning beyond the structural definition.

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 explicitly states 'Look up a SignUpGenius sign-up by its public URL or slug' and lists the returned fields, making the tool's purpose unambiguous. It distinguishes itself from siblings like list_my_signups by emphasizing 'public', no auth, and the URL/slug input.

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?

Provides clear guidance: 'Use this when the user pastes a sign-up link and asks what it is or when it is.' Also notes that no auth is required, which helps differentiate from authenticated-only sibling tools. However, it does not explicitly name alternatives or state when not to use it, preventing a perfect score.

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