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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is covered structurally. The description adds only that details are 'current' and that the service is 'public', which gives some behavioral context. It does not cover authentication, error cases, or pagination beyond what annotations imply.

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 a single front-loaded sentence with no wasted words. It immediately communicates the action, target resource, and scope.

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-resource lookup with rich annotations, a fully described parameter, and an output schema, the description is mostly complete. It does not explain how this tool relates to similar service tools like faith_service_page or faith_service_evidence, leaving a minor sibling-selection 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?

Schema description coverage is 100%, and the single service_id parameter is fully documented with type, pattern, and description in the schema. The tool description does not add format or syntax details beyond what the schema already provides, so baseline 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?

States a specific verb and resource: get details for one Christian Faith service. It also scopes the resource to public services. However, it does not distinguish itself from nearby siblings such as faith_service_page or faith_service_evidence, so it is clear but not sibling-differentiating.

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 phrase 'one public Christian Faith service' implies the tool is for retrieving a single service when its ID is known, as opposed to list or search tools. There is no explicit guidance on when to use this versus faith_services_list, faith_services_search, or faith_service_page. Usage is therefore implied but not fully specified.

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