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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds that results reflect what is 'currently enabled' (a live, not historical, snapshot) and that a commercial fee is included — modest but real context. It says nothing about fee currency, staleness, or whether disabled options are omitted.

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?

One tight sentence with no padding, and the enumeration is front-loaded so the payload is clear at a glance. It is a sentence fragment with no verb, which slightly slows parsing of the action but costs almost nothing in length.

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 an output schema present, the description need not document return values, and the single optional parameter is fully covered by the schema. The only material gap is guidance on when to call it relative to the quote/purchase siblings, which keeps it from a 5.

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% and the single optional 'service' parameter already has a description with an example (did_registration). The description's 'for a service' merely echoes the parameter's role without adding format, default behavior, or what happens when omitted; baseline 3 applies.

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 enumerates the concrete resource returned: approved assets, networks, wallet types, protocols, plus the commercial fee, scoped to a service. Combined with the 'list' verb in the name, an agent can tell this is a read of currently-enabled payment configuration. It does not, however, distinguish itself from quote-oriented siblings such as dmd_get_purchase_quote.

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?

There is no explicit when-to-use guidance: nothing says to call this before creating a quote, to check which assets/network combos are payable, or which sibling to use instead. The phrase 'currently enabled for a service' only implies context rather than stating a usage rule or exclusion.

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