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

With no annotations, the description carries the full burden and does a strong job enumerating the behavioral outputs: account type detection, balance, nonce, proxy implementation standards, and ERC-20 metadata. It also transparently states the cost ($0.005). It stops short of stating read-only/no-side-effects explicitly, but 'Inspect' strongly implies it, and the rich output disclosure is well above average.

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?

A single, front-loaded sentence that opens with the verb and resource, then lists inspected attributes and closes with cost. Every clause carries information; there is no filler or redundancy.

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?

Given a one-parameter tool with no output schema and no annotations, the description covers the essential return categories so an agent knows what to expect. It does not cover error/edge-case behavior (e.g., invalid address handling), but for this complexity level it is nearly complete.

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% and there is one required 'address' parameter, so the description must compensate. It adds meaningful semantics by stating it accepts any Ethereum address and clarifying the recognized address types (EOA, contract, EIP-7702 delegated). It does not add format details like checksum expectations, leaving that to the schema pattern.

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 specific verb ('Inspect') and resource ('any Ethereum address'), then enumerates exactly what it inspects: EOA vs contract vs EIP-7702 delegation, balance, nonce, proxy implementation, and ERC-20 metadata. This makes it readily distinguishable from siblings like ethereum_contract_risk or ethereum_tx_explain, which focus on risk or transactions rather than raw address-level introspection.

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?

No explicit when-to-use guidance, no alternatives, and no exclusions are provided. The description implies you call it to inspect an Ethereum address, but it never says when to prefer it over ethereum_contract_risk, ethereum_token_approvals, or base_address_inspect. The only usage-related note is the $0.005 cost, which is helpful but does not route the agent.

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