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

The annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds genuinely useful behavioral context — the result order (newest first) and that only linked bank accounts are covered — but says nothing about truncation, pagination, or what happens when the limit is hit, which matters for a list tool with a hard 100-item cap.

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 short sentences, well front-loaded with the resource and scope before the ordering detail. The Vietnamese/English duplication mirrors the bilingual schema and serves the likely audience, though it does double the length for a single fact.

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 all-optional parameters, full schema coverage, annotations, and no output schema, the description covers enough to call the tool correctly. It is incomplete about result-set behavior — no mention of whether more than 'limit' rows exist or how to page — which is the main gap for a filtering list tool.

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%, so all four parameters (from, to, type, limit) are already documented with format, enum meaning, defaults and Vietnam-time semantics. The description's 'newest first' and 'money in/out' phrasing loosely maps to the type filter but adds nothing the schema does not already state, 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?

The description names a specific verb and resource ('List bank transactions') plus the scope ('on linked accounts') and the money-in/out qualifier, so an agent can tell it apart from get_balance or list_payment_requests. It stops short of explicitly contrasting itself with the payment-request siblings, which is the only thing keeping it from a 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?

Usage is only implied: 'on linked accounts, newest first' suggests browsing transaction history, but there is no statement of when to prefer this over list_payment_requests or get_balance, and no exclusions or prerequisites. An agent must infer the choice from the tool name alone.

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