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

No annotations are present, so the description carries the full behavioral burden. It discloses what is returned, the two payment rails and same wallet address, no bridge, no subscription/expiry, and the rel attribute on outbound links. It stops short of explicitly saying the call is read-only and does not trigger a purchase, which would have made this stronger.

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?

Six compact sentences cover location, pricing model, payment rails, return values, persistence, and link behavior. Every sentence adds useful information and none restates the schema or repeats the tool name.

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?

Given one optional parameter and no output schema, the description enumerates the important return values: live inventory, both prices, wallet, and taken tiles. It also covers edge-relevant context like no expiry, no subscription, and the fork/bridge nuance, making the tool fully understandable for invocation.

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?

The schema already documents count as an optional exact-quote parameter (1-100) with 100% coverage. The description does not add param-specific meaning beyond this, so the baseline of 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 clearly states what the tool does: it returns live inventory, both prices, the wallet to pay, and every tile already taken on the Wall grid. It is not a tautology and distinguishes the tool from purchase/how-to siblings by emphasizing it is an information-returning endpoint.

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 for when an agent would call it: to inspect inventory, prices, payment address, and taken tiles, or get an exact quote via the optional count. It does not explicitly say 'use this when...' or exclude alternatives, but no sibling tool overlaps with this functionality, so the context is sufficient.

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