get_inventory_stats

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states what data is returned but doesn't describe how the statistics are computed (e.g., real-time vs. cached), any rate limits, error conditions, or authentication requirements. For a read-only tool with zero annotation coverage, this leaves significant gaps in understanding its operational behavior.

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 front-loads the core purpose ('Get statistics about your inventory') and lists the specific counts returned. There is no wasted wording, repetition, or unnecessary detail, making it highly concise and well-structured for quick understanding.

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 (0 parameters, no output schema, no annotations), the description is minimally adequate. It explains what statistics are returned but lacks details on output format, error handling, or dependencies. For a basic read operation, it meets the minimum viable threshold but doesn't provide a complete picture for reliable agent use.

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 lack of inputs. The description adds value by implicitly confirming no parameters are needed, as it doesn't mention any filtering or options. This aligns with the schema, earning a baseline 4 for zero-parameter tools where the description doesn't contradict.

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 tool's purpose with a specific verb ('Get') and resource ('statistics about your inventory'), listing the specific metrics returned (item count, collection count, tag count). It distinguishes itself from sibling tools like 'manage_inventory_items' or 'smart_search' by focusing on aggregated statistics rather than item-level operations. However, it doesn't explicitly contrast with all siblings, keeping it at a 4 rather than a 5.

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. It doesn't mention prerequisites (like whether authentication is required), when it's appropriate versus using other inventory-related tools, or any constraints on usage. With siblings like 'manage_inventory_items' for detailed operations, the lack of comparative context leaves usage unclear.

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