Analysis — Flow trace

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

Beyond the read-only annotations, the description discloses substantial operational traits: cost of one YNAB request per month in the range, a 36-month limit, an extra two requests for movements and transactions, and a suggestion to check the request budget first. This goes well beyond what the annotations provide.

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 front-loaded with purpose, then rationale, parameter formats, and cost warning. Every sentence roughly earns its place, though the middle explanatory sentence about three YNAB resources is slightly verbose for the value it adds.

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 the tool's complexity, the presence of an output schema, and read-only annotations, the description covers purpose, parameter formats for two key fields, and cost/limits well. It still omits what happens if 'to_month' is omitted and does not explain 'plan_id', which are notable gaps for a 4-parameter tool with zero schema descriptions.

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 must carry parameter meaning. It usefully documents the format for 'from_month' and 'to_month' ('YYYY-MM', ISO date, or 'current'), but 'category_id' is only implied and 'plan_id' is entirely unexplained, leaving two of four parameters without clear semantics.

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 states a specific verb and resource: 'Follow one category's money through a range of months', and enumerates the resulting flow components (assigned in, moved in, moved out, spent, refunded, balance left). This scope distinguishes it from sibling tools that operate on groups, single months, or raw movements, without needing to open a schema.

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?

It gives a clear usage context ('where did the holiday money go') and notes the need to check 'overview_request_budget' before long ranges. However, it does not name alternative tools or specify when-not to use it versus e.g. 'transactions_list_by_category' or 'money_movements_list_by_month'.

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