get_upgrade_url

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

No annotations are provided, so the description must carry full burden. It states the tool 'opens a payment page' but does not disclose side effects (e.g., does it create a session? charge anything?), authorization requirements, or the exact response format. Given the lack of annotations, the description is insufficient in revealing behavioral details.

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 extremely concise: two sentences plus parameter documentation. Each sentence is purposeful and front-loaded. There is no redundancy or unnecessary information.

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 the absence of an output schema, the description should explain what the tool returns. It says 'Get a Stripe Checkout URL' but does not specify the response format (e.g., a JSON object with a URL field). It also omits error handling or prerequisites. Adequate for a simple tool, but could be more complete.

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 0%, so the description must add meaning. It does so by listing specific allowed values for 'tier' ('pro', 'business', 'enterprise') and 'billing' ('monthly', 'annual'), and explaining 'email' as pre-filling the checkout field. This compensates well for the missing schema descriptions.

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?

Description clearly states the tool retrieves a Stripe Checkout URL for purchasing/subscribing to a Kiln license. It uses specific verbs and resources. However, it does not explicitly differentiate from siblings like 'activate_license' or 'upgrade_kiln', which would make the purpose even clearer.

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 the tool (to initiate a license purchase), but it lacks explicit guidance on when not to use it or alternatives. For example, it does not mention that 'activate_license' is for post-payment key activation. Usage is implied but not strongly directed.

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