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

With readOnlyHint=true already declaring the safety profile, the description adds real value by framing the output as a non-executing 'plan' plus an execution_plan_reference. However, 'atomic-capable' is left undefined (single transaction vs. batchable), and it does not state whether allowances must be in place before preparing, or that nothing is broadcast.

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 sentences, front-loaded with the scope constraint, with no filler. The density is slightly counterproductive because 'atomic-capable' is jargon that is never unpacked, costing a bit of clarity.

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 and the description still names the key return artifacts (summary and execution_plan_reference), so an agent knows what it gets back. The main omissions are preconditions around approvals and what atomicity guarantees, which a preparation tool arguably should state.

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%, including minItems/maxItems and per-variant field docs, so the schema carries the parameter burden. The description restates the same 1–4,096 bound, mixed kinds and single-chain constraint, adding no meaning beyond the schema; 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?

The description names a specific verb (prepare) and a precisely scoped resource: a plan of 1–4,096 ordered transfers of native, ERC-20, ERC-721 and ERC-1155 assets on a single EVM chain. That scope alone separates it from the many specialized prepare_* siblings (e.g. prepare_wrap_unwrap, prepare_lp_position_transfer). It stops short of explicitly naming a sibling it replaces or excludes, so it lands at 4 rather than 5.

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?

There is no when-to-use guidance: no statement of when an agent should pick this generic transfer planner over a specialized prepare_* tool, and no prerequisite such as required token approvals (even though prepare_approval_revocations exists as a sibling). The only implied usage cue is the returned execution_plan_reference, which hints at a later execution step but does not spell it out.

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