set_budget

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

The description implies a write/mutation operation ('Set'), but without annotations, it fails to disclose important behavioral traits such as whether it overwrites existing budgets, requires authentication, or has side effects. The description does not compensate for the lack of annotations.

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 sentence, which is concise. However, it is too brief to cover essential aspects like behavioral details or usage guidance. Conciseness is positive but not at the expense of completeness.

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 4 parameters, no output schema, and no annotations, the description is insufficient. It does not explain what happens upon execution (e.g., success, error conditions, or whether budgets can overlap). The tool is under-documented for its complexity.

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 already describes 3 parameters with descriptions or constraints (label, limit_usd, alert_pct with default). The description adds 'alert threshold' which corresponds to alert_pct, but overall does not significantly enhance understanding beyond the schema. With 50% schema coverage, the description provides marginal added meaning.

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 ('Set') and what is being set ('a spending budget with alert threshold'), making the purpose unambiguous. However, it does not explicitly differentiate from sibling tools, but the sibling list contains no other budget-related tools, so purpose is clear.

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. There is no mention of prerequisites, restrictions, or conditions under which this tool should be preferred or avoided. The description is entirely silent on usage context.

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