split_subscriptions

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

With no annotations, the description carries the full burden of behavioral disclosure. It only mentions 'give every Subscriptions merchant its own subcategory,' but does not explain side effects, whether it overwrites existing subcategories, if it's idempotent, or what 'blank ones' means. This is insufficient for a mutating bulk operation.

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—one sentence—and front-loads the key action. The parenthetical 'blank ones only' is slightly awkward and could be integrated more clearly, 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?

For a bulk mutation tool with no parameters, annotations, or output schema, the description is too minimal. It lacks details about the operation's effect on existing data, any return value, and the exact criteria for 'blank ones.' This leaves significant gaps for an agent.

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 has zero parameters, so the description is the sole source of semantic meaning. It adds useful scope information ('blank ones only'), indicating which merchants are affected, even though it could be clearer.

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 (giving each Subscriptions merchant its own subcategory) and the specific target (Subscriptions merchants), which distinguishes it from generic category management tools. However, 'blank ones only' is somewhat ambiguous, slightly obscuring the precise condition.

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 explicit guidance on when to use this tool versus alternatives like set_merchant_category or propose_split. The description implies a bulk operation for budgeting, but does not state prerequisites, exclusions, or alternative scenarios.

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