market_rental_history

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

With no annotations provided, the description carries the full burden, and it is exceptionally transparent: it discloses pagination anomalies, one-request behavior, no continuation-page fetching, local array limits, truncation reporting, refusal of oversized records, and the caveat that filters are forwarded without guaranteed effectiveness. This goes well beyond what is typical.

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 dense but each sentence adds distinct value, and the most important purpose and scope statement is front-loaded. It could be better structured with bullet-like separation, but there is no filler or redundant restatement of 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?

For a six-parameter tool with no annotations and no output schema, the description covers operational quirks impressively. However, it does not describe the returned row fields or explicitly state in normative terms that a player or username is required, leaving some ambiguity for an agent trying to form a correct first 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?

Schema description coverage is 0%, so the description must compensate, and it does: it explains player/username as aliases, limit/take as leading-row bounds, and the surprising offset=1/skip=1 empty-result behavior. It covers all six parameters by group, but leaves exact value formats and the normative requirement to supply a player/username somewhat implicit.

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 opening sentence 'Read card rental history with an explicit player or username' gives a specific verb, resource, and scope, so an agent can tell this is a per-account rental-history lookup. It does not explicitly name or contrast sibling tools like market_history or rentals_by_player, so it stops short of full sibling differentiation.

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 a clear precondition ('with an explicit player or username') and useful invocation guidance about pagination, offset/skip behavior, and absence of auto-paging. It does not explicitly state when to prefer this tool over alternatives or list exclusion cases, but the context is much clearer than average.

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