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

Annotations already declare readOnly=false, openWorld=true, idempotent=true, and destructive=false. The description adds important context beyond annotations: card details remain on the hosted page, the idempotency key should be reused after an uncertain response, and payment must be verified with gisdb_get_order.

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 four short sentences, front-loaded with the tool's purpose, followed by preconditions, security behavior, and retry/verification guidance. Every sentence contributes actionable information with no filler.

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 payment-link creation tool with open-world side effects, an output schema, and idempotent annotations, the description covers the necessary pre-call consent requirements, security handling, retry behavior, and post-call verification. Nothing essential for correct invocation is missing.

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 schema already documents all four parameters thoroughly. The description reinforces idempotency_key reuse after uncertain responses, but adds no new syntax or meaning beyond the schema's parameter 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?

The description states a specific verb and resource: 'Create a secure payment link' for selected reviewed records, lead, or subscription offer. It also names the follow-up verification tool, gisdb_get_order, so the agent can distinguish this creation step from sibling billing and search tools.

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?

It gives clear preconditions: show price, coverage, update frequency, renewal and cancellation terms, and obtain the user's purchase request before calling. It also names gisdb_get_order as the verification tool. It does not explicitly list when not to use this tool, but the workflow conditions are strong.

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