Reconcile statement totals

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

No annotations are supplied, so the description must carry the full behavioral burden, and it does disclose one meaningful trait: the check runs 'Locally', which signals that no statement files or account data are uploaded. It says nothing about what the tool returns (a boolean match, a difference amount, or a formatted report), nothing about failure modes, and nothing about how precision or rounding is handled. For a zero-annotation tool that is a noticeable gap, even though this is a low-risk, read-only computation.

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, zero filler. The arithmetic rule is front-loaded so an agent understands the computation before reading the input restriction. Every clause earns its place.

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?

For a simple four-parameter, no-nested-object, pure-computation tool, the description covers what is computed and what inputs are forbidden. With no output schema, the one thing it should also say is what the result looks like (match/mismatch or the residual difference), which is the main remaining gap.

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 has to explain all four fields, and it does map them clearly: openingBalance, creditTotal, debitTotal, and closingBalance correspond to the named 'opening balance', 'credits', 'debits', and 'printed closing balance'. The formula also pins down the expected sign convention (credits add, debits subtract). It does not specify the accepted string format (plain decimal, currency symbols, thousands separators) for the maxLength-40 strings.

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 gives a specific verb-plus-resource ('check ... totals', 'reconcile') and even spells out the arithmetic rule: opening balance + credits - debits versus closing balance. That is far more precise than the title alone. It does not explicitly compare itself to the siblings review_export_headers or get_official_links, but those tools serve unrelated purposes, so the risk of ambiguity is low.

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 'Enter totals only; do not provide account numbers or statement files' sentence is a real input exclusion, which is useful guidance, and the word 'Locally' implies this is a pure arithmetic check rather than a lookup. However, the description never states when an agent should call this tool instead of other options, and it gives no prerequisites or preconditions, so the usage guidance remains only implied.

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