get_index_stats

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. 'Get statistics' implies a read-only operation, but the description doesn't specify what kind of statistics are returned, whether there are rate limits, authentication requirements, or any side effects. This leaves significant behavioral questions unanswered for a tool that presumably provides system metrics.

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 directly states the tool's purpose with zero wasted words. It's appropriately sized for a zero-parameter tool and front-loads the essential information immediately.

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 zero-parameter tool with an output schema (which handles return value documentation), the description covers the basic purpose adequately. However, given that this appears to be a system statistics tool in a knowledge base context, more context about what statistics are provided (index size, document count, performance metrics, etc.) would be helpful since the output schema isn't visible to us for evaluation.

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 0 parameters with 100% schema description coverage, so the schema fully documents the parameter situation. The description appropriately doesn't discuss parameters since none exist, maintaining focus on the tool's purpose without unnecessary parameter discussion.

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 ('Get statistics') and target resource ('knowledge base index'), providing a specific verb+resource combination. However, it doesn't distinguish this tool from similar siblings like 'evaluate_retrieval' or 'list_categories' which might also provide statistical or listing information about the knowledge base.

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 provides no guidance on when to use this tool versus alternatives. With siblings like 'evaluate_retrieval', 'list_documents', and 'list_categories' that might provide related information, there's no indication of when this specific statistics retrieval is appropriate versus other listing/evaluation tools.

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