budget_overview

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It does disclose a non-obvious behavior: floor categories like Investments flip the comparison, flagging under-target instead of over-budget. This is valuable context beyond what a simple 'spend vs budget' would imply. However, it doesn't mention other behaviors like what happens if no budget is set or how categories are included.

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 description is a single sentence with a parenthetical, making it concise and front-loaded with the core purpose. It conveys the main function and a key exception without extraneous wording. The parenthetical is dense but necessary for accurate usage. Nearly every word earns its place, though the sentence could be slightly clearer with an explicit verb.

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?

Given there is no output schema and no annotations, the description must explain what the tool returns and how it behaves. It covers the flagging logic and floor category flip, which is useful, but it lacks details about the return structure (e.g., list of categories with spend, budget, status), the month parameter format, and whether it includes all categories or only those with budgets. This is partially complete but leaves gaps.

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?

The schema has one optional parameter 'month' with no description (0% schema coverage). The description only says 'for a month' but fails to specify the expected format (e.g., YYYY-MM, month name, or date range). This leaves the agent guessing about how to invoke the tool correctly. The description adds minimal semantic value beyond the schema's bare parameter name.

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 clearly states the tool's purpose: showing spend versus budget per category for a month, with over-budget flagging and a special case for floor categories. It distinguishes from siblings like get_category_breakdown (which likely shows spend only) and compare_periods (which compares time periods) by focusing on budget comparison. However, it lacks an explicit verb like 'get' or 'display', though the name 'budget_overview' implies it.

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 description implies when to use the tool: when you need a monthly budget vs. spend comparison per category. However, it does not provide explicit alternatives or exclusions, such as 'use get_category_breakdown for spend-only breakdown' or 'use compare_periods for historical trends'. Since the purpose is clear, usage is implied, but no direct guidance is given.

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