isw_fintech_build_response

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

No annotations are provided, so the description must fully disclose behavior. It only says 'Build' without specifying side effects, idempotency, authorization needs, or whether it is a read-only computation. For a tool that may modify state, this is insufficient.

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 very short (one sentence), but it sacrifices clarity for brevity. It lacks structure and does not earn its place because it omits critical information required for correct usage.

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 tool has 7 parameters, no output schema, and no annotations, the description is severely incomplete. It does not explain what the payload is used for, how the MAC is computed, or what valid inputs are. This leaves the agent with very little to correctly invoke the tool.

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 low (14%), with only the 'confirm' parameter documented in the schema. The description adds no parameter-level details; it merely restates the overall function. It fails to explain the meaning of transactionReference, requestId, responseCode, etc.

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 it builds a 'Fintech Card Processing response payload and optional MAC', which gives a verb and resource. However, it is vague about what constitutes such a response and how it differs from sibling tools like isw_fintech_validate_debit_payload or isw_fintech_compute_mac.

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 vs. alternatives, nor any context about prerequisites or exclusions. The sibling list is extensive but no differentiation is offered.

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