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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, yet the description still adds substantial behavior the annotations cannot convey: the buy-price formula (share x 1.02), the first-buy seeding of one token to a burn address, and pause status on reserve shortfall. That is exactly the extra context this field should carry.

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 dense but front-loaded sentence that places the core action first, then the three facts returned, then the read-only caveat and required input. Every clause earns its place, though the nested parentheticals make it slightly heavy to parse.

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 carry return semantics — and it does, enumerating minted token count, first-buy flag, and pause status. Combined with the required-input note, an agent has everything needed to invoke and interpret the call.

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?

One parameter with 100% schema description coverage including formatting examples ('10' or '10.00'), so the schema already does the heavy lifting. The description restates 'Requires: usd' and adds no syntax or constraint beyond it; baseline 3 is appropriate.

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 (quote), the resource (a buy of Obsidian Cherry), and the qualifying input (a given USD amount). It further enumerates the exact outputs, so an agent knows precisely what this tool answers without opening a schema.

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 makes clear this is a non-executing preview ('Does not execute anything — read-only'), which implies when it is used, but it never names an alternative or states an explicit when-to-use/when-not-to-use rule against siblings like get_price. Usage is left to inference.

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