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

Annotations declare readOnlyHint=false, destructiveHint=true and idempotentHint=true; the description reinforces this by explaining that action:remove withdraws the claim. It also adds substantive context beyond annotations: the Free cost, the two-step challenge/signature auth flow per chain (EIP-191 on Base, ed25519 on Solana), and the reassurance that 'Claims never change scores'.

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-loaded with 'Free.' followed by the core action, then the signed two-call flow, then the removal caveat. It is dense but each sentence carries distinct, actionable information with minimal waste.

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 detailed, and the description covers the auth flow, signature formats, cost, and removal semantics adequately. Minor gaps remain (e.g., behavior when the wallet has no endpoints, or confirmation of idempotency), but nothing essential for correct invocation is missing.

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%, so the schema already documents each field and baseline is 3. The description adds procedural meaning by explaining how wallet, issued_at and signature relate across the two calls and that action:remove withdraws a claim, which goes beyond the field-level schema text.

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: 'Claim every x402 endpoint paid to your wallet' with a clear two-call workflow. The purpose is unambiguous and an agent can immediately tell what the tool accomplishes. It does not, however, explicitly differentiate itself from siblings like settled_sellers or settled_submit.

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 lays out the exact usage sequence: first call with wallet to obtain message_to_sign/issued_at, then call again with issued_at and signature, and note that action:remove withdraws a claim. This is clear contextual guidance. It stops short of naming when to prefer this tool over sibling alternatives or when not to use it.

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