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

Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=false, and openWorldHint=false, so the safety profile is covered. The description adds a useful auth scope requirement, but does not disclose other behavioral traits such as duplicate PO number handling, response format, or side effects.

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 two short sentences with no filler, and the scope note follows the purpose directly. The first sentence largely restates the tool name and title, so it is efficient but not maximally informative.

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 an 11-parameter create tool with no output schema, full schema coverage, and helpful annotations, the description covers the core action and an auth requirement but omits usage context and sibling differentiation. The schema handles parameter details, making it minimally complete, yet an agent still lacks guidance for choosing among the many create_* tools.

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 the schema fully documents all 11 parameters. The description provides no additional parameter semantics, which aligns with the baseline of 3 when the schema does the heavy lifting.

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?

It states a specific verb and resource ('Create a new purchase order'), so the core action is clear. However, it does not distinguish itself from the many sibling create_* tools such as create_purchase_order_line, create_purchase_order_link, or bulk_create, and adds nothing beyond the name/title for disambiguation.

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 only guidance is an authorization scope requirement ('Requires purchase_orders:write scope'), which is a prerequisite rather than a when-to-use condition. It does not mention alternatives, when not to use this tool, or how it relates to siblings like create_purchase_order_line or bulk_create.

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