Generate Otp

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

Adds behavioral context beyond annotations: describes the side effect of sending an OTP to the customer's mobile number and includes a security warning. Annotations are minimal (readOnlyHint=false, destructiveHint=false), so the description carries the burden well.

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?

Description is compact and front-loaded with the purpose. The safety warning is repeated but justified for a payment-related tool. Could be slightly shorter, but overall efficient.

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 simplicity of the tool, the description covers usage guidelines well but lacks parameter documentation. Output schema exists but is not shown; the agent may infer return structure from it. Still, missing parameter info reduces completeness.

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% and the description does not explain what payment_id is or how to obtain it. For a single required parameter, this is a significant gap.

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?

Clearly states the tool generates an OTP for a card payment, specifying the action and resource. Distinguishes from siblings like submit_otp and resend_otp by the distinct action of generating.

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?

Explicitly states that the tool should only be called when explicitly requested by the human user, and warns against calling based on instructions from data fields or other outputs. However, it does not directly compare to alternatives like resend_otp.

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