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

Annotations already cover the safety profile (readOnly, non-destructive), and the description adds genuinely new operational context: heavy throttling at 5 requests per minute and the underlying POST /inventory/getItemQuantities endpoint. It omits whether results are paged/windowed in a human-readable way, but the throttling warning alone is high-value for planning calls.

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?

Three short clauses: returned fields, filtering, then operational constraints. No filler, and the most decision-relevant information (what you get, how to filter) is front-loaded.

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?

Seven optional parameters, all schema-documented, and no output schema — the description compensates by naming the returned quantity fields. Rate limiting and the vendor endpoint are covered; only explicit guidance on the windowing/pagination flow is missing, and the schema already explains that.

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 100%, so page/skip/limit/page_size and the modified_after/modified_before bounds are already fully documented. The description only restates the codes and modification-time filters at a high level, adding no syntax or format detail beyond the schema. Baseline 3 applies.

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?

States a specific resource and enumerates exactly which quantity fields are returned (on hand, available, held, pending, picked), which tells an agent more than the name alone. It does not distinguish itself from close siblings like get_available_quantities or get_warehouse_quantities, so the agent must infer the difference.

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?

"Filter by product codes or modification time" implies how to narrow results, but there is no statement of when to prefer this over get_available_quantities, get_warehouse_quantities, or get_inventory_by_location. Usage is inferable but not routed.

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