buy_email_pack

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

No annotations provided; the description discloses the return type (Stripe checkout URL), activation conditions, and non-expiry, but could mention mutation aspects or prerequisites.

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?

Three concise sentences, each conveying essential information without redundancy; front-loaded with the core action.

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?

Covers product details, activation, and return value, but lacks mention of prerequisites like having an email billing account or domain setup.

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 coverage is 100% with descriptions for 'email' and 'wallet'; the description adds no additional clarification on when to use each parameter or that at least one is required.

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 action (buy), the product ($5 email pack, 10,000 emails, never expire), and activation conditions, distinguishing it from siblings like tier_checkout.

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 implies when to use (when tier daily limit exhausted and domain verified) but does not explicitly state alternatives or scenarios where this tool should not be used.

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