createCustomCategories

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

The description only says 'create', which aligns with annotations (readOnlyHint=false). However, it does not disclose behavioral traits such as whether duplicate categories are allowed, maximum number of categories, or any side effects. The openWorldHint=false annotation is not explained.

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 short sentence with no superfluous words. It is front-loaded and efficient. However, it could be slightly expanded to include parameter or usage hints without losing conciseness.

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 simple tool (2 params, no output schema), the description is minimal. It lacks context such as whether categories are reusable across types, uniqueness constraints, or behavior when type is invalid. The complete set of sibling tools (e.g., getCustomCategories, deleteCustomCategories) suggests a CRUD pattern, but no guidance is provided.

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 input schema has 2 parameters with 0% description coverage. The description does not explain the meaning or usage of the 'categories' array or the 'type' enum. The agent must infer semantics solely from the schema, which lacks human-readable explanations.

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 action (create), resource (custom categories), and context (for transactions). It distinguishes from sibling tools like deleteCustomCategories and getCustomCategories by using 'create'. The verb and resource are specific and unambiguous.

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 alternatives like createTransaction or createRecurringTransaction. The description does not mention prerequisites, limitations, or exclusions for using createCustomCategories.

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