ynab_compare_transactions

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 behavioral detail by specifying the return structure: 'comparison report with matched, unmatched_bank, unmatched_ynab transactions'. This goes beyond annotations without contradicting them.

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 concise with a single-line purpose and a clear bullet-like list of parameters. It is front-loaded and free of fluff. However, it could be more compact by integrating the parameter list into structured documentation, but overall it is efficient.

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 12 parameters, nested csv_format object, and an output schema, the description should cover key behavioral aspects like matching logic, tolerances, and format auto-detection. It only mentions the return report and a subset of parameters, leaving many details unexplained. This is insufficient for a tool of this complexity.

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 compensate. It explains only 5 of 12 parameters (budget_id, account_id, csv_file_path/csv_data, statement_start_date, statement_date) via the docstring, omitting debug, csv_format, amount_tolerance, auto_detect_format, date_tolerance_days, enable_chronology_bonus. This is a significant gap for a complex tool.

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 verb 'compare' and the resources 'bank CSV transactions' with 'YNAB transactions', with the explicit goal to 'find missing or mismatched entries'. This distinguishes it from sibling tools like ynab_list_transactions or ynab_get_transaction, as it is the only comparison tool.

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 explains when to use the tool (for comparing bank CSV data against a YNAB account) and provides usage context (optional budget_id, required account_id, etc.). It does not explicitly state when not to use or name alternatives, but given the sibling list, this is the sole comparison tool, so no exclusion is needed.

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