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

Goes well beyond the annotations by disclosing that the server relays to a public door, holds no keys/funds/tokens, requires no gas, and that signing happens in the user's own wallet or passkey. That is real trust and cost context an agent needs. It omits the non-idempotent retry behavior implied by idempotentHint=false, which matters for a submission step.

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 the required inputs, which is good, but the tail repeats itself: 'Free with a valid signature' is restated as 'Cost and signer: free, no gas,' and the no-key point is made twice. Roughly a third of the text is redundant.

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, though the description usefully notes it returns the recorded offer and token terms. Combined with the openWorldHint relay context, the definition is nearly complete; the main gap is guidance on re-submission given the non-idempotent hint.

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% and the schema descriptions already say bodyJson is the exact string from prepare_token_offer and signature is the personal_sign output over MESSAGE_TO_SIGN. The description restates those constraints rather than adding new semantics, so the baseline 3 applies.

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 concrete action (complete the offer), names the exact endpoint it relays to (POST /labor/work/:workId/back/token), and ties itself to step 1 via prepare_token_offer. This is clearly distinguishable from siblings like prepare_token_offer and submit_token_settlement.

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 the explicit precondition chain: run prepare_token_offer first, pass its BODY_JSON unchanged, and supply a wallet signature over MESSAGE_TO_SIGN. It also states the operation is free with a valid signature. It does not name a when-not-to-use case or point to submit_token_settlement as the contrasting path, so it stops short of full routing guidance.

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