arb_l1_base_fee

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

The description states the value is an 'estimate' and 'current', indicating it is not authoritative or static. With no annotations provided, the description adequately conveys the read-only nature and that the result may be approximate. However, it does not detail potential staleness or the source of the estimate.

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 a single sentence that efficiently communicates the tool's purpose. It is not overly brief to the point of being vague, but it could potentially include a bit more context without becoming wordy. It earns its place.

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?

The tool has no output schema, so the description should explain what value is returned. It mentions an 'estimate' but does not specify the unit or format (e.g., wei, gwei) or how often it updates. While the purpose is clear, the lack of output detail leaves some ambiguity for the agent.

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 input schema has no parameters, so the description does not need to add parameter details. The baseline score of 4 applies because the description is clear and sufficient for a parameterless tool.

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 returns the current L1 base fee estimate for data-availability pricing. The verb 'Current... estimate' implies retrieval, and the resource is specific. This distinguishes it from sibling tools like arb_gas_prices or arb_min_gas_price, which serve different gas-related purposes.

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 implies the tool is for getting the L1 base fee estimate when needed for data-availability pricing, but it provides no explicit guidance on when to use this tool versus alternatives like arb_gas_prices or arb_l1_pricing. No 'when to use' or 'when not to use' information is given.

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