List transaction categories

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

Annotations already declare this read-only, idempotent, and non-destructive, so the description does not need to restate that. The description adds that the results include IDs and group membership, which provides a little context beyond safety traits, but it does not describe ordering, pagination, or any side effects. This is consistent with the annotations; no contradiction exists.

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, front-loaded sentence that states the exact action and data included. It is concise, contains no fluff, and uses every word to convey the tool's function.

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?

For a zero-parameter, read-only tool with an output schema and annotations that already establish safety, the description is largely complete. However, the presence of the sibling get_transaction_category_groups creates a potential ambiguity: an agent might wonder whether this tool returns group or categories themselves. The description does not explicitly clarify that distinction, which makes it a 4 rather than a full 5.

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 tool takes zero parameters, so there are no parameters to explain. The baseline for 0 parameters is 4, and the description does not need to compensate for missing schema documentation. It adds nothing about parameters, but none are needed.

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 clear verb and resource: 'List all transaction categories' and adds the scope 'with IDs and category groups.' It is precise and distinct from the related transaction‐categories tool, but it does not explicitly name the sibling get_transaction_category_groups to clarify the difference, so it misses the full 5.

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?

There is no guidance on when to use this tool versus alternatives or when not to use it. The description gives no context about selection among the many list/category tools in the sibling set.

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