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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered without the description. The description adds the domain context that output is path-specific and limited to three named paths, but says nothing about auth requirements, return format, or limitations beyond what the annotations supply.

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 no filler: the verb, the resource, and the distinguishing scope all appear before any qualifier. Nothing could be removed without losing information.

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?

For a read-only, single-optional-parameter tool with full schema coverage and an output schema, the description is nearly sufficient, and the annotations carry the safety semantics. Only the relationship to sibling setup tools is unaddressed, which is a minor gap for a leaf lookup tool.

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 coverage is 100% for the single enum parameter, which already documents the three allowed values and the payment_links default. The description merely restates the same enum values in prose rather than adding format or behavioral detail, so the baseline 3 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?

The description pairs a specific verb ("Return") with a specific resource ("install instructions") and enumerates the three supported install paths, so an agent knows exactly what it produces. It stops short of naming or differentiating itself from siblings such as verify_tracking_installation or read_setup_status, which share the setup/installation domain.

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?

Usage is only implied: the three enumerated paths signal the scenarios in which the tool applies, but there is no explicit when-to-use, when-not, or routing to alternatives like verify_tracking_installation. An agent can infer intent but gets no guidance on how this fits alongside the other setup-related siblings.

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