get_purchase_link

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

No annotations are provided, so the description carries full burden. It mentions 'one-time-purchase' which is a useful behavioral attribute, but it does not disclose error behavior, output format (explicitly), or any side effects. For a get operation, it's minimal and leaves the agent uncertain about what happens on invalid bundleId or the exact return structure.

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?

A single, compact sentence that is front-loaded with the key purpose. Zero wasted words; it is appropriately concise and clear.

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 single-parameter read-only tool with no output schema, the description is mostly adequate. It implies the return is a URL ('product URL'), which covers the main need. Missing error-handling details and explicit return type, but for this simple case, it's sufficient for an agent to invoke correctly.

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 baseline is 3. The description does not add any parameter semantics beyond what the schema already provides (bundleId with example and reference to list_bundles). No extra value is added.

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 states a specific verb ('Get'), a specific resource ('one-time-purchase product URL'), and the target ('a bundle'). It clearly distinguishes from sibling tools, which focus on households, benchmarks, or listing bundles. No ambiguity about what this tool does.

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 no explicit when-to-use guidance or alternatives. However, the schema references 'list_bundles' for obtaining a bundleId, which indirectly suggests usage. But the description itself does not state when to use this tool versus others, so guidance is only implied, not explicit.

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