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

With no annotations provided, the description carries full burden for behavioral disclosure. It clearly states 'Never broadcasts, never charges' and 'FREE batch dry-run,' which are critical non-mutating, non-cost behavioral guarantees. This goes beyond the schema and aligns with the tool's simulation intent.

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 three sentences, front-loaded with the core purpose, then key safety guarantee, then usage example. Every sentence adds value without verbosity, making it highly concise and well-structured for quick agent comprehension.

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?

The description covers the essential context: it is a safe dry-run, returns a structured result, and is for multi-step planning. It lacks an output schema but the description lists key return fields. It also omits mention of the max 20 steps, though that is captured in the schema. Overall, it is nearly complete given the tool's moderate 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 schema already provides 100% coverage for both parameters, including a clear description of the steps array and stop_on_first_failure. The description adds the example flow 'wrap → mint-sla → renew' to illustrate valid action values, but it does not add substantial semantic detail beyond the schema. Baseline 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?

The description clearly states the tool's function: a 'FREE batch dry-run' that accepts an ordered list of {action, params} steps and returns detailed results. It uses a specific verb ('simulate') and resource ('paid action batch'), and distinguishes itself from sibling tools like 'simulate_paid_action' and 'simulate_action' by emphasizing the batch nature and the multi-step flow examples.

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 explicitly says 'Use to plan and price multi-step flows (e.g. wrap → mint-sla → renew) before executing,' providing clear context for when to use the tool. It does not explicitly mention alternatives like single-action simulators, but the batch focus and example imply the appropriate use case, giving strong situational guidance.

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