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

The description discloses that the tool only builds an unsigned transaction rather than executing a withdrawal, which is core behavioral transparency beyond the default annotations. It further explains the effect of the built transaction, shares burned and underlying returned with interest, so an agent knows what the output represents.

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?

Three concise sentences with no fluff; the purpose is front-loaded and supporting role/behavior details follow. This is appropriately sized for the tool's complexity.

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?

The description plus the fully-covered schema and output schema cover all needed aspects: target tranche, share amount, owner/receiver roles, chain selection, and the unsigned nature of the result. Nothing required for correct invocation is left ambiguous.

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?

With 100% schema description coverage, the baseline is 3 and no additional parameter documentation is required. The description's owner/receiver role notes are useful but largely repeat the schema descriptions, so it adds little param-specific meaning beyond 'including accrued interest.'

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 starts with a specific verb and resource: 'Build an unsigned redeem transaction to withdraw from an Arcadia lending tranche (ERC-4626)'. It also names the exact effect — burning shares and receiving the underlying asset with accrued interest — which makes it clearly distinct from pool deposit and account withdrawal siblings.

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 when-to-use context is clear: use this tool to withdraw from an Arcadia lending tranche by redeeming tranche shares. It also gives key role constraints, owner must be the shares holder and receiver gets the underlying asset, so an agent knows how to populate addresses. It does not explicitly rule out sibling tools, so it falls short of a 5.

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