ynab_create_account

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

The description reveals that the tool creates an account, supports a dry run mode, and returns an account object. Annotations indicate it's a write operation (readOnlyHint=false) and not destructive. The description adds the dry_run detail and return format, which are not in 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 description is well-structured with clear sections (Args, Returns, Examples). It is concise, front-loaded with the main purpose, and every sentence adds value.

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 (5 parameters, 2 required, output schema exists), the description covers all necessary aspects: parameter details, return format, and usage examples. No obvious 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?

With 0% schema coverage, the description fully compensates by detailing each parameter (budget_id, name, type, balance, dry_run), including defaults, valid values, and examples. This provides essential meaning beyond the raw schema.

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 action ('Create a new account') and resource ('in a YNAB budget'). The purpose is unambiguous and distinguishes it from sibling tools that create transactions or other entities.

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 lacks guidance on when to use this tool versus alternatives like ynab_create_transaction or other account-related tools. No explicit context for selection is provided.

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