Plan an order from cart to provisioned subscriptions

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

Beyond the annotations (read-only, idempotent), the description discloses that no credentials are used, no network call is made, and nothing is executed. This is valuable operational context that goes beyond what annotations provide.

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 dense but well-structured; the first sentence gives the core function, followed by usage, safety, output, and next steps. No filler 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?

It provides a complete picture: purpose, usage, constraints, output structure, and related tools (pc_generate_call, pc_get_scenario). Combined with the annotations, the agent has everything needed to select and invoke correctly.

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 fully documents the optional customerId parameter with a detailed description (GUID format, substitution behavior, omit to get placeholders). The tool description itself does not add further parameter details, but the schema coverage is 100%, making this acceptable.

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 returns an ordered workflow from cart to provisioned subscriptions, listing the phases (build cart, checkout, poll, resolve, confirm). It explicitly differentiates from pc_plan_purchase and pc_plan_subscription_change, making the purpose unambiguous.

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 when-to-use ('when a purchase has to be verified rather than assumed') and names alternatives for choosing a purchase and for subscription changes. Also clarifies it's planning-only, not execution.

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