pay_agent

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

No annotations provided; description mentions construction/execution and auditability via the reason parameter. However, it lacks details on authorization, reversibility, or failure handling, which are important for a payment tool.

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 sentences with no wasted words. First defines action, second provides usage context. Highly 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?

Covers basic purpose and when to use, but lacks behavioral details like permissions, reversibility, or response behavior. Given the financial nature and no output schema or annotations, more completeness would be beneficial.

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?

All 5 parameters have schema descriptions (100% coverage). Description adds minor context ('human-readable units', 'logical reason for auditability') but does not significantly extend schema info.

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 'Constructs and executes a direct payment to another agent', specifying the verb and resource. Context of 'pay for services, data, or compute' distinguishes it from sibling tools like transfer_token or deposit_*.

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?

Provides explicit use cases (services, data, compute). Though it doesn't list alternatives or exclusions, the clear purpose helps differentiate it from sibling tools.

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