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

Annotations already declare readOnly, idempotent, closed-world, non-destructive, so the safety profile is covered. The description adds a genuinely valuable semantic rule beyond annotations: 'Absent predicates mean NOT supported (closed semantics)', which prevents misinterpretation of missing fields. It does not describe the return shape in detail, but that is the only remaining gap.

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?

Three tight sentences, front-loaded with the core action and payload contents, followed by the usage routing and the closed-semantics caveat. Zero filler.

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 usefully summarizes what is returned and, critically, explains how to interpret absent predicates. Only the undocumented 'language' parameter is left unaddressed, a minor gap for a simple two-parameter read 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 50%: id_or_path is documented in the schema, but the 'language' parameter has no description in either place. The description adds no parameter-level guidance (e.g., what form the id_or_path takes or what language affects), so it neither compensates for nor repeats the schema.

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?

Specific verb and resource: 'Return the complete Configuration Envelope of a product class in one call', and it enumerates the payload (supportsSetupModel, perSurfaceSupports* predicates with resolved labels, typical* descriptors). It is clearly distinguishable from the granular ptpge_get_term sibling.

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?

Explicitly states when to use it ('use it before composing a configuration') and names the alternative it replaces ('instead of many individual ptpge_get_term calls'). The routing decision is fully specified.

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