list_projects

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

With no annotations provided, the description carries full burden for behavioral disclosure. While it mentions the tool lists projects 'scoped to API Key,' it doesn't address important behavioral aspects like authentication requirements, rate limits, pagination behavior, error conditions, or whether this is a read-only operation. The example response format is helpful but insufficient for comprehensive behavioral understanding.

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 appropriately sized and front-loaded with the core functionality statement. The structure with separate 'Args' and 'Returns' sections is organized, though the example could be more concise. Most sentences earn their place, with only minor verbosity in the example formatting.

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 parameterless listing tool with no output schema, the description provides basic functionality and return format example. However, without annotations and with multiple sibling listing tools, it lacks sufficient context about authentication, scoping implications, and differentiation from similar tools. The example helps but doesn't fully compensate for missing behavioral context.

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 tool has zero parameters with 100% schema description coverage. The description explicitly states 'Args: None,' which correctly communicates the parameterless nature. This provides clear semantic information beyond what the empty schema alone would convey.

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 action ('List all projects') and resource ('projects scoped to API Key in Zilliz Cloud'), providing specific verb+resource combination. However, it doesn't differentiate from sibling tools like 'list_clusters' or 'list_collections' beyond mentioning 'projects' specifically.

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 about when to use this tool versus alternatives. The description doesn't mention prerequisites, context for usage, or relationships to other listing tools in the sibling set. It simply states what the tool does without usage context.

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