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

Annotations already declare readOnly, idempotent, openWorld, and non-destructive behavior, so the safety profile is covered. The description adds non-obvious operational context: it is $0.06 per call over x402 on Base, an x-credit-token header buys unlimited calls, there is no free tier, and no API key is required. That payment/auth detail is genuinely useful and not derivable from structured fields.

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?

Front-loads the value proposition and the produced output before pricing minutiae, and every sentence carries information. The pricing sentence is dense but relevant given no free tier; overall it is appropriately sized.

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?

An output schema exists, so return values need not be explained, yet the description still summarizes them. Combined with the payment and input requirements, an agent has enough to select and invoke the tool correctly; the only gap is explicit routing against sibling approval/drain tools.

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?

One parameter with 100% schema description coverage, so the baseline is 3. The description only restates 'Required input: address' and adds no format, chain, or validation semantics beyond what the schema already says.

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?

States a specific verb and resource: it pulls a wallet's active token approvals and produces a security audit with risk level, USD at risk, and revoke recommendations. This is much clearer than a name restatement, though it does not explicitly differentiate itself from near-neighbors such as token_approvals, approval_advisor, or wallet_drain_watch.

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?

Gives a concrete trigger context — the wallet-safety check run before trusting an address — so an agent knows when it applies. It stops short of naming alternatives or stating when not to use it, so it is not a full 5.

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