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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds real behavioral context beyond that: unpaid rows include a next_action field describing the follow-up POST /mint/confirm call. It doesn't cover pagination or row fields beyond next_action, preventing a 5.

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?

Three short front-loaded sentences with no filler: purpose first, then the status alias, then the row-level next_action detail. Every sentence carries actionable information.

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, so the description must convey return behavior; it usefully notes that rows can carry next_action, but says nothing about pagination, ordering, or what other fields a row contains. Adequate for a simple read-only list tool but not complete.

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 schema already documents the status parameter. The description goes further by explaining that 'unpaid' is an alias for 'pending', which the schema does not, and this prevents an agent from treating them as distinct states.

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 and resource with scope: 'List protocol-fee obligations for this API key'. An agent can tell it apart from list_mints or confirm_mint_fee. It does not explicitly name a sibling, so it stops short of a 5.

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?

Usage is implied by the status values and the hint that unpaid rows carry next_action pointing at POST /mint/confirm. However there is no explicit when-to-use/when-not or a named alternative such as confirm_mint_fee for acting on those obligations.

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