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 of behavioral disclosure and does so exceptionally well. It documents pagination quirks (offset/skip empty behavior, limit/take bounding), the fact that it does not auto-fetch continuation pages, local array limits (100 rows, 256 KiB) with truncation reporting, and refusal of oversized records. This goes far beyond what the schema alone could convey.

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 lengthy and packed with technical behavioral notes. While every sentence contributes useful information, the overall length and density could be trimmed for easier consumption. The core purpose is front-loaded, but the detailed edge-case explanations might be better placed in a separate notes section.

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 tool with no output schema, no annotations, and six parameters, the description covers a substantial amount of necessary context: what it does, how pagination behaves, output limits, and error handling. It does not describe the shape of returned data, but that is partially mitigated by the mention of array responses and truncation. Overall, it is well above minimal viability.

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?

Given 0% schema description coverage, the description compensates by explaining the semantics of key parameters: it ties 'player' and 'username' to the requirement, and explains limit, take, offset, and skip behavior through concrete examples. It does not detail every parameter exhaustively, but it adds enough functional meaning for an agent to reason about pagination and required inputs.

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 begins with 'Read card rental history with an explicit player or username,' which clearly states the verb, resource, and a key requirement. While it differentiates from generic market history by specifying card rental history, it does not explicitly distinguish itself from closely related siblings like rentals_by_player or market_active_rentals, so it lacks explicit 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 provides no guidance on when to use this tool versus alternatives. It does not mention any conditions for choosing this over other rental or history tools, nor does it state any exclusions or prerequisites. The only hint is that a player or username is required, but that is implicit from the schema and not framed as a usage rule.

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