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

Annotations already declare readOnly, idempotent and non-destructive, so the safety profile is covered. The description still earns credit for two non-obvious traits: the authenticated wallet is excluded server-side and cannot be supplied, and the call is all-or-nothing ('any item failure fails the whole call'). Those additions are genuinely useful but the disclosure stops there.

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?

Two compact sentences with the resource and cardinality front-loaded and the failure semantics second. Nothing is padding, though 'ordered' is mildly ambiguous wording that could be tightened.

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?

An output schema exists, so return values need no explanation, and the description covers scope, cardinality and failure mode. What remains missing is the routing guidance against the single-book siblings, which matters given how many orderbook-related tools exist.

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%, including descriptions of side, view, depth, chainId and marketAddress, so the schema carries parameter meaning. The description adds only the item-count bound and 'ordered', and it is unclear whether 'ordered' means preserved result ordering or a sequence of requests.

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 ('Get ... destination books') with batch scope and a distinguishing qualifier ('caller-executable'). It does not name the likely alternatives (problee_get_orderbook, problee_get_market_depth), so an agent must infer the batch-vs-single split rather than being told it.

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 1-to-100 range and plural 'books' imply this is the multi-market read path, but the description never says when to prefer it over the single-book siblings or lists any prerequisite or exclusion beyond the batch size.

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