defi_get_chain_fees

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. It only says 'Get' which implies a read-only operation, but it does not state whether results are current or historical, what time range is covered, what units or currency are used, or whether any rate limiting or pagination applies. This is a significant gap for a data-fetching 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 a single front-loaded sentence with no filler or redundant wording. Every word contributes meaning, and it is appropriately sized for a one-parameter read tool.

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?

Despite low complexity (one required parameter), the description is under-specified. It does not explain what constitutes 'fees/revenue' (e.g., gas fees, protocol revenue, token-denominated amounts), what time period is covered, or how the output should be interpreted. Without an output schema, the description alone leaves the agent guessing about return structure, making it incomplete for reliable invocation.

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 100% since the only parameter 'chain' has an inline description with examples. The tool description adds no additional parameter meaning beyond the schema, so the baseline of 3 is appropriate.

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 uses a clear verb ('Get') and identifies the resource ('fees/revenue data') scoped to 'a specific blockchain.' This distinguishes it from protocol-level fee tools like defi_get_protocol_fees and from overview tools like defi_get_fees_overview, though it does not explicitly name alternatives.

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 phrase 'for a specific blockchain' implies this tool is for chain-level fee data as opposed to protocol-level or global fees, but it gives no explicit when-to-use guidance, exclusions, or named alternatives. Usage context is only weakly implied.

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