circle_policy_set

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

No annotations provided, so description carries full burden. It only states the action ('set spend controls') without disclosing behavioral traits like destructive potential, idempotency, authorization needs, or whether changes override or merge with existing policies.

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?

Two concise sentences, front-loaded with purpose and key items. Every sentence adds value without extraneous content.

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?

Description covers the essence but lacks details on return values (no output schema) and behavior on duplicate calls (overwrite vs merge). For a 5-parameter tool with moderate complexity, it is adequate but not fully complete.

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 coverage is 100% with clear parameter descriptions. The description reiterates the parameter types (daily cap, per-call cap, lists) but adds no new meaning beyond what the schema already provides. Baseline of 3 is appropriate.

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?

Description clearly states verb 'Set' and resource 'spend controls on a Circle wallet' with specific items: daily cap, per-x402-call cap, allow/block lists. It distinguishes from sibling tools like balance, transfer, and wallet creation.

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?

Includes a usage hint ('Always set a daily_cap before enabling automated payments') but does not explicitly specify when to use this tool versus alternatives or when not to use it. Guidance is implied but not comprehensive.

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