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

With readOnlyHint=false, openWorldHint=true, idempotentHint=true and destructiveHint=false already supplied, the description still adds real value: it charges nothing, it may create a provider-side customer record, and the method is only usable after provider confirmation. That clarifies the side-effect profile and the asynchronous completion beyond the 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?

Four short clauses lead with the action and follow with prerequisites and behavior; no filler. Slightly dense as a single block but every sentence earns its place.

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?

An output schema exists so return values need not be explained, and the description nevertheless flags the hosted-link result and the fact that readiness depends on provider confirmation. Coverage is sufficient for a two-parameter setup tool, with only the relationship to sibling billing options left implicit.

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 description coverage is 100%, so partnerId and the optional offerId redirect are fully documented in the schema. The description adds no parameter-level detail such as required IDs or how offerId affects the returned link, so baseline applies.

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?

States a concrete verb and resource: creates the agency's customer record at the payment provider and returns a hosted link where the owner adds a payment method. This is clear and distinguishable from the sibling billing tools, though it never names an alternative explicitly.

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?

Gives prerequisites (agency owner, accepted terms already granted) which implicitly signal when the call will succeed, but never says when to prefer this over agency_billing_set_automatic_collection or other billing setup paths, nor when not to use it.

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