list_providers

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

Annotations already indicate readOnlyHint, idempotentHint, and destructiveHint, establishing a non-destructive, read-only behavior. The description adds 'with their metadata' but does not disclose further behavioral traits such as sorting, pagination, or rate limits. The annotation coverage reduces the need for extensive description, so a score of 3 is appropriate.

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, concise sentence that immediately conveys the tool's purpose. It is front-loaded and contains no extraneous information, making it efficient and easy to parse.

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?

Given the tool's simplicity (one optional parameter, no output schema), the description adequately covers the core functionality. While it could mention that the result is a list of providers with specific fields, the context provided by sibling tools and annotations compensates for minor omissions.

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 input schema provides 100% coverage with a single optional parameter ('tier') and clear enum values. The description does not add any additional meaning beyond the schema, which already fully documents the parameter's purpose and constraints. Hence, a baseline score of 3 is warranted.

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 'List all cloud providers with their metadata' uses a specific verb 'List' and clearly identifies the resource (cloud providers) and scope (all, with metadata). It effectively distinguishes itself from sibling tools like 'compare_provider_coverage' or 'find_compliant_regions', which have more specialized filtering or comparison purposes.

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 implies a straightforward listing use case but provides no explicit guidance on when to use this tool versus alternatives, nor does it mention when not to use it or any prerequisites. While the purpose is clear, the lack of contextual cues for tool selection leaves room for ambiguity.

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