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

With no annotations, the description carries the behavioral disclosure burden. It transparently states the output fields (chain id, latest block, gas price, native token USD price) and the pricing model, including the exact cost per call. It does not cover edge cases like network errors or return format, but for a zero-parameter health check it provides adequate behavioral context.

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 sentences, zero filler: the first sentence lists the exact data returned, the second conveys cost and pay-per-call model. Every clause adds value, and the structure is front-loaded.

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 zero-parameter read-only tool, the description covers the essential invocation and cost details. The absence of an output schema means the agent must infer value formats (e.g., gas price units) from the field names alone, which is a minor completeness gap. Overall it is sufficient for basic use.

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 tool takes no parameters, so the input schema is empty and schema description coverage is not a factor. The baseline for zero-parameter tools is 4, and the description appropriately omits parameter details since there are none.

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 identifies the resource (Base network health) and enumerates the returned data points (chain id, latest block, gas price, native token USD price), making the tool's function clear. It does not use an explicit verb like 'get' or 'return', but the intent is unambiguous. The 'base' prefix and health focus differentiate it from sibling tools such as base_gas or polygon_health.

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 this is the go-to tool for a low-cost Base network status snapshot, mentioning it is the cheapest call and pay-per-call. It does not explicitly compare with siblings such as base_gas or base_block, nor state when those alternatives would be more appropriate, leaving usage guidance largely implied.

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