getCustomerDetails

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

Since no annotations are present, the description carries the burden of explaining behavior. It clearly indicates a read-only retrieval and enumerates the returned fields, but it does not mention failure modes, authorization requirements, or data freshness. This is acceptable for a simple lookup but not fully transparent.

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 short and front-loaded with the core action. There is slight redundancy between 'Retrieve detailed customer record by ID' and 'Retrieves the complete customer account record', but the overall structure is efficient and easy to scan.

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 simple single-parameter tool with no output schema, the description adequately covers what is returned and when to call it. It could mention behavior when the customer is not found, but nothing essential is missing for selecting and invoking the 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 description coverage is 100%, with the customerId parameter already documented with format and example. The description adds no new parameter-level semantics beyond reinforcing that retrieval is by ID, so the baseline score of 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 states a specific verb ('Retrieve'), a specific resource ('detailed customer record by ID'), and lists exactly what the record includes. It clearly differentiates from sibling tools like getBillingHistory and listSupportTickets by framing this as account-metadata lookup.

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 gives explicit usage context: use this tool after discovering a customerId to inspect account metadata. It does not explicitly name alternatives or exclusion conditions, but the 'by ID' constraint and typical lookup purpose make the usage intent clear.

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