initialize_payment

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

With no annotations, the description must carry the behavioral burden. It discloses that the tool creates a new payment session and returns a redirect URL, which is a concrete side-effect and output. However, it does not mention whether funds are captured immediately, how webhooks/notifications behave, idempotency around merchant_transaction_id, or response 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?

Two short sentences, each informative: the operation and the returned redirect URL. No filler or redundancy. The key output is front-loaded in the second sentence. Well structured.

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 12-parameter payment tool with no output schema, the description states the essential flow (initialize payment → get URL → redirect customer) but lacks response format details, lifecycle context (e.g., status checking via check_payment_status), and side-effect expectations. The schema covers parameters well, but the absence of any output schema or error/edge-case information leaves clear gaps.

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?

The input schema already covers all 12 parameters with descriptions (100% coverage), so the description does not need to add parameter details. It adds no parameter semantics, but the baseline of 3 applies since the schema carries the burden. No additional value beyond schema.

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 verb 'Initialize' and the resource 'a new CinetPay web payment,' and specifies the key output (a payment URL for redirecting the customer). It is distinguishable from siblings like check_payment_status and create_transfer by its focus on starting a web payment, though it does not explicitly name any alternative.

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 provides no guidance on when to use this tool versus alternatives such as create_transfer or check_payment_status. It does not state prerequisites, exclusions, or conditions that would route an agent to a sibling. This is a missing usage-guideline layer.

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