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

Annotations already declare readOnlyHint=false, idempotentHint=true and destructiveHint=false, so safety and repeat-call behavior are covered structurally. The description contributes the business trigger for the state change but says nothing about what 'confirmed' does downstream, whether it can be undone, or how the required idempotency_key and dry_run affect execution.

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?

A single front-loaded sentence with the verb and precondition up front and no filler. It is efficient, though it omits information that would earn its place given the untyped parameters.

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 no prose. However, for a mutation tool with 0% schema coverage the description should at minimum explain dry_run and the idempotency contract; both are absent, leaving an agent unable to call it precisely.

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 0% across three parameters, and the description mentions none of them. The required idempotency_key, the note field, and especially the dry_run flag (which meaningfully changes behavior) are left entirely unexplained.

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 pairs a specific verb ('Mark ... as confirmed') with a specific resource ('setup integration'), so the state transition is unambiguous. It implicitly separates itself from read-only siblings like read_setup_status and verify_tracking_installation, though it never names them.

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?

It states the precondition that selects this tool: use it 'after the merchant verifies the tracking script and Stripe client_reference_id handoff.' That is a clear usage context, but there are no exclusions and no pointer to what to call when the verification has not happened yet.

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