Set Category Targets

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

Annotations already provide idempotentHint=true, destructiveHint=false, readOnlyHint=false. The description adds that it returns previous state, which is useful. However, it does not disclose any side effects beyond mutation, permissions, or rate limits. Since annotations cover the safety profile, the description adds modest value.

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 extremely concise: two sentences, no wasted words, front-loaded with the core action. It efficiently conveys the primary purpose and return value.

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 tool's complexity (modifies targets, has nested objects in schema) and absence of output schema, the description mentions returning previous state but not its format. It also does not note the budget_id default behavior (though schema does). Still, it is largely complete for a moderately complex tool with good annotations.

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 50% (the schema itself describes nested properties well). The description does not elaborate on parameters ('targets', 'budget_id') beyond the schema. It adds no extra meaning about parameter usage or formats, so it does not compensate for the coverage gap. Baseline 3 is appropriate as schema carries the burden.

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 tool creates or updates targets on categories and returns previous state. It uses specific verbs ('Create or update') and resource ('targets on... categories'), distinguishing it from siblings like get_targets (read-only) and set_category_budgets (different operation).

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 does not explicitly specify when to use this tool versus alternatives. Context from sibling names implies it is for setting category targets, but no 'when-not' or preconditions are provided. The purpose is clear enough to infer usage, but guidance is lacking.

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