buy_extra_bids

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

No annotations are provided, so the description carries full burden. It discloses that this is a purchase action and its trigger condition, and implies automation. However, it omits important behavioral traits such as cost/currency details, whether the action is reversible, potential failure modes, or impact on the bid allowance. The description gives some context but lacks depth for a financial transaction tool.

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 short, front-loaded with the main purpose, and every sentence contributes value. It communicates the trigger, the parameter relationship, and the automation benefit without unnecessary words.

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?

With 3 parameters, no output schema, and no annotations, the description covers the core use case and the quantity/usdcAmount relationship, but lacks details on agentId, expected output (e.g., new balance), error conditions, and edge cases. It is adequate but not fully complete for an agent to confidently invoke.

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. It clarifies the key relationship that 'quantity OR usdcAmount' should be specified, which is valuable. However, it does not explain agentId nor define what 'quantity' represents (e.g., number of credits) or the exact format of usdcAmount. The OR constraint adds partial meaning beyond the schema, leaving gaps.

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 the tool's purpose with a specific verb ('Buy') and resource ('additional bid credits'), and includes the condition ('when your free allowance is exhausted'). It distinguishes itself from sibling tools like place_bid by focusing on purchasing credits rather than placing bids.

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?

Provides explicit trigger condition ('when your free allowance is exhausted') and implies use in automated contexts ('Lets you keep bidding without a human'). Does not explicitly name alternatives or exclusions, but the condition gives clear usage context.

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