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

Annotations already declare a safe read (readOnlyHint=true, destructiveHint=false, idempotent), but the description adds substantial behavior beyond them: per-DID billing semantics (monthly_price times attached numbers plus one-time setup_price, in USD), empty-list meaning, and the fact that only plan-priced requirements are returned. It does not mention pagination page limits, but the billing and empty-result semantics are unusually rich disclosure.

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 key point (check before creating) is front-loaded and every clause carries information, but the billing and empty-list discussion is dense and delivered in one long paragraph with heavy dashes and semicolons. It is informative rather than wasteful, though a little sprawling for a list tool.

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?

With no output schema, the description carries the burden of return semantics and does so: it names the requirement fields, the pricing fields, and what an empty list means. Nothing an agent needs to call and interpret this tool correctly 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 coverage is 100%, so the baseline is 3, but the description adds meaning the schema does not: filtering by country_iso and/or did_group_type is optional and omitting them returns every plan-priced requirement, paginated. That clarifies the default behavior of the two filter parameters beyond their field-level docs.

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 ('Check what an emergency verification needs BEFORE creating') and enumerates the returned content: identity type, mandatory identity/address fields, and area levels. An agent can distinguish it from create_emergency_verification and list_requirements from the text alone.

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 explicitly positions the tool before creation, names the follow-up tools for each gap (update_identity to fill identity/address fields, create_regulation_upload_link with purpose 'emergency' to upload proofs), and describes filter vs. no-filter behavior. This is genuinely actionable routing guidance.

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