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

With no annotations, the description carries the transparency burden and does well by naming the checks performed (phishing databases, domain age, brand look-alikes, seed-phrase requests, wallet-drainer code) and the red/yellow/green with reasons return format. It does not explicitly state side-effect, auth, or rate-limit behavior, so it falls short of a 5.

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?

Three compact sentences front-load the purpose, then list the checks and the return shape. No filler; the dense brand list is functional context rather than padding.

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 one-parameter check with no output schema, the description explains the return categories and the kinds of evidence behind them. It is nearly complete, though it could clarify read-only behavior and when to use this over read_webpage.

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 coverage is 100% for the single url parameter, so the schema already defines the expected address format. The description adds no parameter-specific syntax or constraints beyond what the schema states, making 3 the baseline.

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 opens with a direct question that identifies the resource (website) and the exact judgment being made (crypto scam/phishing), and it lists concrete signals it evaluates. It clearly distinguishes this security-check purpose from sibling tools like read_webpage, 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?

Usage is implied by the phishing/scam question, but there is no explicit when-to-use statement, no exclusions, and no mention of when to choose read_webpage or another sibling. The agent must infer that this is the website security-check tool.

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