render_list_services

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

With no annotations provided, the description bears full responsibility for behavioral disclosure. It only states the purpose but does not mention that it reads data, requires an API key (listed in schema), supports pagination via limit and cursor, or that results may be filtered by type. These omissions reduce transparency.

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, efficient sentence that immediately communicates the tool's primary action and scope. No extraneous words or information, achieving high conciseness with strong front-loading.

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?

Despite having 4 parameters and no output schema or annotations, the description omits details about pagination, filtering, authentication, and return format. Given the complexity, it fails to provide sufficient guidance for correct invocation.

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 75% (3 of 4 params described). The tool description adds no additional meaning for any parameter, and the undocumented 'cursor' parameter is not clarified. The description does not compensate for the missing schema detail.

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 clearly states the verb 'List' and the resource 'Render services', with examples of service types like 'web services, static sites, cron jobs, etc.'. This distinguishes it from sibling tools like render_get_service (single service) and render_list_deploys (deploys), making purpose unambiguous.

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?

No guidance is provided on when to use this tool versus alternatives such as render_get_service for specific services. There is no mention of use cases, prerequisites, or exclusions, leaving the agent to infer context from other tools.

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