Categorize Transaction

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

The description says 'suggest,' which implies an analysis-only behavior, yet annotations declare readOnlyHint=false, so the side-effect profile is not reflected in the text. It does not disclose whether the suggestion is returned only or written back to the transaction, or what happens if the transaction is already categorized. Annotations cover idempotency and non-destructiveness but leave this mutation ambiguity unresolved.

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?

A single front-loaded sentence conveys the operation with no filler or redundant restating of the tool name. It is concise without sacrificing clarity.

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?

With no output schema, the description should explain what kind of suggestion is returned (category label, ID, confidence, reason) and whether the tool persists anything. It provides neither, and the readOnlyHint=false annotation makes the need for such context more pressing.

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 coverage is 100%, so transaction_id is already documented and the description adds no additional meaning beyond confirming the target is a transaction. No enum, nested, or optional parameters need further explanation, so the 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 uses a specific verb ('suggest') with a specific resource ('category') and target ('transaction'), making the tool's job unmistakable. It is clearly distinct from siblings like create_transaction or update_transaction, which modify transaction records.

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?

No guidance is provided on when to use this tool versus list_categories, create_transaction, or update_transaction. The phrase 'for a transaction' implies the trigger, but the description does not say whether this is a preliminary read-only suggestion or an actual categorization step, nor does it state prerequisites.

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