Get Jumbo Profile

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

readOnlyHint=true already tells the agent this is a safe read. Since there is no output schema, the description's enumeration of returned fields (loyalty profile, name, customer ID, Extra's card details, receipt preferences) is genuinely useful behavioral context. It stops short of stating whether authentication is required, which matters given a jumbo_login sibling.

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 and resource lead and the field list follows. Appropriately sized for a zero-parameter read tool, though the field list is a flat enumeration rather than prioritized 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?

With no output schema, the description partly compensates by naming the returned data, but it omits whether a session/login is required and what happens if the user is unauthenticated or has no loyalty account. For an account-scoped read tool among login-bearing siblings, that is a meaningful gap.

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 tool takes zero parameters, so the baseline is 4. There is no parameter syntax or filtering behavior for the description to add, and it correctly says nothing misleading about inputs.

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?

Clear verb+resource ('Get customer loyalty profile') with an enumeration of the returned fields, which separates it from siblings like jumbo_get_balance or jumbo_get_stamps. It does not explicitly name an alternative, but the resource is specific enough that an agent can identify it.

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 states what data comes back but gives no when-to-use guidance, no prerequisites, and no mention of sibling tools such as jumbo_get_balance or jumbo_get_stamps that also return account data. The intended trigger must be inferred.

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