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

Annotations declare readOnlyHint=false, idempotentHint=false, and openWorldHint=true; the description adds mobile notification dispatch, 20-point per-call billing, async phone approval flow, and prohibition on auto-approval, providing rich side-effect context beyond structured fields.

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?

Compact structure front-loads purpose, then billing warning, approval flow, prohibition, and cost; every sentence earns its place.

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?

No output schema exists, but the description explains return values (transactionId and status), the required handoff to get_driving_license, and operational constraints; complete for an async billable authentication 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 100% with all four required parameters documented, so the schema carries parameter meaning; the description adds no syntax or format detail for name, birthDate, phone, or authProvider.

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?

States a specific verb (request identity verification) and resource (driver's license lookup), and explicitly names get_driving_license as the downstream tool, distinguishing it from siblings.

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 says to call after user confirmation, not to repeat while approval is pending, not to auto-approve, and to pass transactionId to get_driving_license after approval.

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