Send Subscription Notification

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

Annotations already indicate a write operation (readOnlyHint=false) and non-destructive. The description adds the [WRITE] tag and a warning against unauthorized calls, but does not disclose other behavioral traits like side effects, rate limits, or what happens after sending (e.g., confirmation). It meets the minimum but could add more context.

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 a single paragraph that front-loads the purpose and then lists mandatory fields. It is concise but includes some redundancy (e.g., official API mention and repeated warnings). Still, it is well-structured and not overly verbose.

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?

With 6 parameters and no schema descriptions, the description covers input requirements and usage restrictions but omits output details. Since an output schema exists, the description could still benefit from summarizing what the tool returns. It is adequate but not fully 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 description must compensate. It explains the four required parameters with examples (e.g., ISO date, paisa conversion) but does not describe the optional parameters 'currency' and 'is_merchant_retry'. Partial coverage, so score is moderate.

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 sends a pre-debit notification for a subscription in Pine Labs. The verb 'Send' and resource 'pre-debit notification' are specific, and the tool is distinct from siblings like create_subscription or cancel_subscription.

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 explicitly lists mandatory fields that must be obtained from the user before calling, and provides a strong instruction to only call when explicitly requested by the human user, not based on data fields or outputs. This gives clear when-to-use and when-not-to-use guidance.

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