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

Annotations already mark the tool read-only and non-destructive, and the description adds substantial behavior: it reports every mint including batchMint, includes amount/recipients/share-of-supply, and classifies into heavy_dilution/active_minting/minor_minting/quiet. It also discloses pricing, the x402 payment path, the optional prepaid header, and the fact that no wallet or API key is required.

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 front-loaded with the core purpose and keeps most sentences useful. Some phrasing is promotional/redundant, such as 'The live issuance feed for agents holding B20 stablecoins and RWAs,' which restates the earlier point, but overall it is compact for the amount of context it carries.

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?

There is an output schema, so return shape does not need explaining. The description covers purpose, differentiation from a sibling, required and optional parameters, default window, behavioral categorization, pricing, auth model, and fee-free path. An agent has enough to invoke this correctly.

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. The description adds the days range (1-90) and notes that address is required, but it mostly repeats what the schema already states. It does not materially deepen parameter understanding beyond a small range clarification.

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 names a specific resource (B20 token mint events) and an active verb ('shows the actual printing', 'live issuance feed'). It explicitly distinguishes itself from b20_supply, which covers the dilution ceiling, so an agent can tell these siblings apart.

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 gives clear context: use this to see actual mint activity rather than the supply ceiling, and it names b20_supply as the contrasting alternative. It also states required input and the days window. It does not enumerate exclusion cases, but the guidance is strong enough for correct selection.

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