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

With readOnlyHint=true supplied, the key added value is the disclosed precondition burden: this tool does not check ownership or finalization, and the agent is responsible for verifying both via the user's wallet/RPC. It also bounds scope to exactly one request ID, so no batching is implied. It does not say whether preparation is chain-restricted beyond the schema, but nothing contradicts the read-only annotation since 'prepare' means building a transaction, not submitting it.

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?

Two tight sentences: the operation and its singular scope come first, then the agent's verification duty. No filler, no restatement of the title, and the most decision-relevant constraint is front-loaded.

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 no explanation, and all three parameters are fully documented in the schema. What remains is a modest gap: the description never states the chain/contract context of the claim or what the prepared transaction will contain, which an agent might want for a mainnet-only Ethereum operation.

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%, and each parameter already carries its constraint (chain 1, address, positive decimal request ID), so the schema does the heavy lifting and a baseline 3 applies. The description adds a cross-parameter relationship the schema cannot express — that request_id must be owned by sender and already finalized and unclaimed — but contributes nothing further about formats.

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 target (prepare the claimWithdrawal call) plus the exact object being claimed: one finalized, unclaimed unstETH request ID. It implicitly separates itself from prepare_lido_withdrawal_request and prepare_lido_unwrap through the 'finalized, unclaimed' qualifier, though it never names those siblings, so an agent must infer the boundary.

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 conditions are implied rather than spelled out: the request must be finalized, unclaimed, singular, and owned by the sender, and the description tells the agent to verify these through the wallet/RPC first. There is no explicit 'use X instead when the request is not yet finalized' routing against prepare_lido_withdrawal_request, which is the obvious adjacent sibling.

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