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

Annotations only mark the operation as destructive/not read-only. The description adds meaningful behavioral context: it mentions using a Base transaction hash, verifying canonical payment proof, and conditionally activating the account. It does not detail failure behavior or side effects when proof is not confirmed, so it is not a full 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?

A single dense sentence that front-loads the core action and includes the essential condition ('if canonical payment proof is confirmed'). There is no filler or redundant restating of the tool name.

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?

With no output schema, no parameter descriptions, and only sparse annotations, the description should explain expected return values, failure modes, and parameter semantics. It explains the high-level flow but omits what the agent will receive back and what happens when proof is not confirmed, leaving meaningful gaps for a mutating 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 0%, so the description must compensate for parameter meanings. It only clarifies the transaction hash ('using a Base transaction hash'); onboarding_id and onboarding_secret are not explained beyond their names and patterns. The secret's role and why all three parameters are required are left underspecified.

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 names a specific verb ('Reconcile') and resource ('submitted but uncertain x402 settlement'), and states the follow-up action ('activate the account'). It clearly distinguishes this from sibling tools like mithrandir_onboarding_start, onboarding_pay, and onboarding_status by describing a distinct reconcile-then-activate flow.

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 phrase 'submitted but uncertain' gives a clear trigger condition for when this tool is appropriate. It does not explicitly mention when not to use it or name alternatives like onboarding_status, but the context is clear enough for an agent to recognize the intended use case.

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