Month-End Close Checklist

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description adds meaningful behavioral context beyond that, especially the precise 'overdue_as_of' classification and the separate due_before_month_end_* sections. This helps an agent understand the output logic without contradicting the annotations.

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?

The first sentence is concise and front-loaded with the tool's purpose. The second sentence is dense and introduces an internal term (overdue_as_of) not present in the schema, but it earns its place by clarifying a nontrivial boundary condition.

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?

There is no output schema, so the description appropriately enumerates the checklist categories and names the due_before_month_end_* sections. It does not detail the full response shape or fresh/caching interplay, but for a read-only aggregation tool with strong annotations, the coverage is sufficient.

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 both parameters are already documented. The description adds some context about how the month relates to overdue_as_of, but it does not meaningfully extend parameter-level meaning beyond the schema. Baseline 3 is appropriate.

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 ('Generate') and a precise resource ('month-end checklist'), then enumerates its contents: unconfirmed journals/invoices, unreconciled bank transactions, and overdue receivables/payables. This clearly distinguishes it from narrower siblings like compute_receivables_aging or reconcile_bank_transactions.

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 month-end close context is implied and the date logic is explained, but the description does not explicitly state when to choose this aggregate tool over overlapping alternatives such as compute_payables_aging, compute_receivables_aging, or analyze_unconfirmed_transactions. There are no exclusions or alternative routing cues.

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