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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds one genuinely new behavioral fact — that the response embeds the provider's data alongside the service — but says nothing about behavior when the id is unknown or whether the payload is truncated.

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 key scope fact (provider data included) appears immediately rather than buried, and nothing is redundant with the title or schema.

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 one-parameter read tool with full schema coverage, no output schema, and safety annotations already present, this is close to sufficient. The remaining gap is that without an output schema the description could say more about what "machine-readable detail" comprises, though naming the provider inclusion partly covers that.

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 only parameter (service_id) carries a "svc_..." prefix hint, so the schema already does the work. The description adds no meaning about id format, source, or validity beyond what the schema states; 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 names a specific verb+resource pairing ("detail of one service") and adds scope beyond the name by noting it includes the provider. It implicitly contrasts with the sibling search_services (plural, search) but never names an alternative explicitly, so differentiation is inferred rather than stated.

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: "one service" signals a single-record lookup rather than a listing, which weakly distinguishes it from search_services. There is no explicit statement of when to prefer this over search, nor any prerequisite such as needing a valid service_id from a prior search result.

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